What to do if the computer does not recognize the device. Removing and reinstalling the driver. Reconnecting the device

15.06.2020

Sometimes Code 45 blue screen errors related to hardware can be caused by corrupted random access memory (RAM). If you are experiencing random computer reboots, beeping sounds on startup, or other computer problems (in addition to BSOD 45 errors), then it is highly likely that your memory is corrupted. In fact, almost 10% of application crashes on Windows OS are caused by memory corruption.

If you have recently added new memory to your computer, we recommend temporarily removing it to make sure it is not the cause of the Code 45 error. If this action clears the BSOD, then that is the source of the problem, and therefore the new memory is either incompatible with some other device. either your equipment or is damaged. In this case, you will need to replace new memory modules.

If you haven't added new memory, the next step is to conduct a diagnostic test of the existing computer memory. A memory test scans for serious memory failures and intermittent errors that could be causing your blue screen death 45.

Although the latest Windows versions contain a utility for testing RAM, I highly recommend using Memtest86 instead. Memtest86 is a BIOS based testing software, unlike other test programs that run in Windows environment. The advantage of this approach is that the utility allows you to check ALL operating memory for Code 45 errors, while other programs cannot check memory areas occupied by the program itself, the operating system and other running programs.

The next time you connect, say, a USB flash drive to your computer or some device with a USB interface, the “USB device not recognized” error may appear on your screen instead of the desired result.

This error appears as a message that appears on the right side of the Start taskbar and states the following information:

One of the USB devices connected to this computer is not working properly and Windows cannot recognize it. For help resolving this issue, click this message.

This message appears immediately after connecting a USB device to your computer. This problem is quite serious since many devices nowadays use a USB interface.

In most cases, the “USB device not recognized” error appears due to the following reasons:

Incorrect USB port.
In the operating room Windows system Certain drivers are missing, which is why there is a conflict between the OS.
Unstable USB controller.
USB has gone into temporary shutdown.
Outdated drivers.

To check the functionality of a device with a USB interface, simply connect it to another PC. If it functions normally there and no “USB device not recognized” error appears, then the problem definitely lies in your computer and its settings.

Solving the “USB device not recognized” error for Windows 7, 8, 8.1, 10

If your computer does not recognize the USB device, but easily connects to other computers, then the problem in the form of the “USB device not recognized” error lies in your PC. In this case, try the following steps:

Method #1 Remove the USB driver through Device Manager

Click right click mouse to “Start” and select “Device Manager”.
Expand the USB Controllers category and find the USB that your Windows cannot detect.
Right-click on it and select "Delete".
Restart your PC and try connecting the USB device.

Method No. 2 Updating the USB driver

For this purpose, you can use either third party software that will update your driver in automatic mode, either go to the website of the manufacturer of your device and download the necessary drivers from there, or simply update the drivers through the Device Manager, which we will consider now:

Go all the way to the undetectable USB in the Task Manager as shown in the previous method.
Right-click on it and select Update Drivers.
Wait until the system determines the need for an update. If this occurs, wait until the update process is complete, and then try connecting the USB device to the port again and see if the “USB device not recognized” error appears.

Method #3 Changing the USB Settings

Right-click on Start and select Control Panel.
Select "Power Options" and then select the "High Performance" plan.
Click on the "Configure Power Plan" button next to your power plan.
Next, click on “Change” Extra options nutrition."
Expand the USB Settings directory.
Insert the following parameters into it:
- On battery: Prohibited
- From the network: Prohibited
Click "Apply" and restart your computer.

We hope the above methods helped you resolve the “USB device not recognized” error.

Sometimes, when connecting a flash drive, printer or other devices that are connected via USB, an error occurs. What USB device not identified. This problem is relevant both in Windows 7 and Windows 8, and in Windows 10. Also, this error occurs when working with USB 2.0 and USB 3.0. Therefore, today we will write simple instructions with several methods to solve this problem. Go.

What to do if “USB device is not recognized”

So, if a similar error occurs when connecting any device via USB, then first of all you need to connect it to another USB port. The problem may be in the device itself and we need to make sure of this.

Next, if the computer does not see the device through other ports, then you need to test it on another computer or laptop. If the device is still not recognized by the computer, then most likely the problem is in the device itself. In this case, it is necessary to diagnose the device itself. By the way, if everything is as described just above, then the methods described below are unlikely to help you. At best, read on.

There is another way after which there is a high probability that the USB device will work:

First, remove the device itself from the USB input, then turn off the computer and remove the plug from the socket, now press the power button and HOLD for a few seconds. Thus, the remaining charge will disappear from other components.
Turn on the computer and try to connect the USB device. Most likely it will work.

The third method is a little faster than the previous ones. It lies in the fact that if a lot of USB ports are connected to the computer various devices, then you should try to disable some of them, rather than connect the recognition device to the rear USB output. If everything works, then congratulations, otherwise we move on to the next stage.

We solve the problem through the device manager

In this method we will use the task manager and I would like to immediately note that this method will help some, but not others. So, to begin with, by pressing the keys Win+R, open the window “ Execute" and enter a phrase there that will open the device manager for us: devmgmt.msc.

Since today we are talking about problems with USB, most likely the problematic device is located in the “ USB controllers" There are also unidentified devices that you should also pay attention to.

If the device is unidentified, that is, with a yellow exclamation mark, then you can try to update it via the Internet by clicking on it RMB. Or, if it doesn’t help, use online version Driver Pack Solution that will help you find the missing driver. We wrote about her.

Here are a couple more methods, in case the unidentified device is located in the USB controllers tab.

Click on the device RMB and in " Properties» select the tab « Driver", where you need to click roll back. If there is no such item, then simply click delete, and then update the equipment configuration and see if the unidentified device has disappeared.

In this case, we need to go to the item “ Generic USB Hub», « USB Root Controller" And " USB hub" In the properties of these devices in " power management"You must REMOVE the checkbox in the item " Allow this device to turn off to save power».

The next method that works on Windows 8.1 is that for all the devices that we listed above, you need to properties click on the button " Update drivers"and then, in the window that appears, select search on this computer. The most compatible ones should already be on your computer, and you will see them in the window. You need to select it and click next. If everything went well, you can try connecting the USB device that was not working. By the way, before connecting, I would advise you to restart your computer again.

Devices are not recognized in Windows 8.1 – USB 3.0

For example, on laptops this problem can be a fairly common condition. Especially if you are running Windows 8.1, and devices such as flash drives run on USB 3.0.

To resolve this same error with the device not recognizing, you need to change some settings in . To do this you need to go to Control Panel and select " Power supply" Now you need to select the power supply scheme that you use, for example, “High performance”, you can set it for everyone. So, by clicking on " Power plan settings"Next you need to go to " change advanced settings..." In the settings item for temporarily disabling the USB port, you must activate the value “ Prohibit».

That's all. If this article helped you, be sure to write about it in the comments. In the event that I missed any other valid methods for correcting this error, it would not be bad if you also talked about this in the comments.

If you have errors in Device Manager, then this article is just for you. The article describes how to find the error code and how to fix them.

This article is intended for experienced users and users with sufficient skills in working with drivers, installing programs and removing them.

The error code can be viewed in Device Manager in the Properties dialog box for specific device. Many errors can also be resolved in Device Manager.

To begin troubleshooting, follow these steps:

1. Make sure that Device Manager is open and the device that is experiencing the error is selected. There are several recommended procedures you can follow to resolve the issue using Device Manager.

a) Right click the icon My computer and select Properties.

b) Select a tab Equipment and then click device Manager.

C) Double-click the device type that is experiencing the error. For example, if the problem is related to the video adapter, double-click the category Video adapters to view the devices listed there. A list of devices appears. If a device has errors, a red exclamation point appears next to the device. If the device is not known, a yellow question mark appears next to the device.

d) Right-click the device that is experiencing the error and select Properties. The Properties dialog box for this device opens. The error code is displayed in the area Device status this dialog box.

2. Use the troubleshooting wizard, if available, to diagnose and resolve the problem.

a) In the Device Properties dialog box, click the Are common.

b) Click Troubleshooting, to start it Troubleshooting Wizard. The wizard will ask several simple questions and will provide a solution to the problem based on the answers received. If the troubleshooting wizard is not available, go to step 3.

c) Follow the troubleshooting steps suggested by the wizard.

d) Check the area Device status in the Properties dialog box for that device to see if the problem is resolved. If the error is resolved, the problem is resolved. Otherwise, continue with step 3.

3. If the Troubleshooting Wizard is not available or does not resolve the issue, look for the error code in this article.

Code 1

The device is not configured correctly. (Code 1)

Cause

Drivers for the device are not installed (or installed incorrectly) on the computer.

Solution

Driver update

In the device properties dialog box, select the Driver and then click Update driver to run If updating the driver does not help, consult your hardware documentation.

Code 3

The driver for this device is corrupted, or the system does not have enough RAM or other resources. (Code 3)

Solution

Close some applications

If your computer does not have enough memory to run your device, you can close some applications to free up memory. You should also check memory, system resources and virtual memory settings.
To test your memory and system resources open task manager. To open the task manager, press the keyboard shortcut CTRL+ALT+DEL and then click Task Manager.
To check your virtual memory settings, right-click the icon My computer, highlight Properties, go to the tab Additionally and then select the command Settings in area Performance.

The device driver might be corrupted. If the driver is damaged, uninstall the driver in Device Manager and search for new hardware to reinstall the driver.

Driver and then click the button Delete. Follow the instructions.
2. Restart your computer.
Action select command. Follow the instructions.
Install additional RAM

Code 10

If there is a FailReasonString value in the registry key associated with the device, its value is displayed in the error message. The driver or enumerator places a registry string value here. If the FailReasonString parameter is missing, the following error message appears.

This device cannot be started. (Code 10)

Solution

To solve this problem, you can use the following method.

Driver update

Driver click the button Update driver, to start it Hardware Update Wizard. Follow the instructions to update the driver.

You may need to specify the path where the driver is located. The driver may be included in Windows. Also, driver files may have been saved from previous installations of this device. If you need to install a driver that is not on your computer, you can download latest version drivers from the hardware manufacturer's website.

Code 12

No free resources found for this device. If you want to use this device, you will have to disable one of the other devices on the system. (Code 12)

Cause

This error may occur if two devices installed on the computer have been assigned the same I/O ports, the same interrupts, or the same channel. direct access to memory (BIOS settings, operating system, or their interaction). This error message may also appear if the BIOS has not allocated enough resources to the device.

Solution

You can use the Troubleshooting Wizard in Device Manager to isolate the conflict and disable the conflicting device.

Disable the conflicting device

Are common.
2. Click Troubleshooting, to start it Troubleshooting Wizard

Code 14

For proper operation this device, you need to restart your computer. (Code 14)

Solution

Restart your computer.

On the menu Start select team Shutdown, then select Reboot in the dialog box Completion Windows operation

Code 16

Unable to identify all resources used by the device. (Code 16)

Cause

The device is only partially configured.

Solution

Assign additional resources to the device

Note. The following actions will only be effective if the device is a device Plug and Play. If this device is not a Plug and Play device, you should refer to the documentation for the device for more information.

1. In the Properties dialog box for the device, click the Resources.
2. If the list of resources contains a resource with question mark, select it to assign to this device.
- If the resource cannot be changed, click the button Change settings.
If the button - Change parameters is not available, try unchecking Automatic setup.

Code 18

Reinstall the drivers for this device. (Code 18)

Solution

Update your driver. If this does not help, reinstall the driver for this device using Device Manager.

Driver update

Driver and then click Update driver, to start it Hardware Update Wizard. Follow the instructions to update the driver. If this does not help, you will have to uninstall and reinstall this driver.

Removing and reinstalling the driver

If the driver is damaged, uninstall the driver in Device Manager and search for new hardware to reinstall the driver.
Driver and then click Delete. Follow the instructions.
2. Restart your computer.
Action, then select Update hardware configuration. Follow the instructions.

Code 19

Windows cannot start this device because its settings information (in the registry) is incomplete or corrupt. To resolve this issue, first try running Troubleshooting Wizard. If this does not help, you should uninstall and then reinstall the device. (Code 19)

Solution

A registry problem has been detected.

This can happen when more than one service is defined for a device, there is an error opening the service registry key, or the driver name cannot be obtained from the service registry key. Here are several methods that may help resolve the problem.

Removing and reinstalling the driver

Uninstall the driver in Device Manager and search for new hardware to reinstall the driver.

You may need to specify the path where the driver is located. The driver may be included in Windows. Also, driver files may have been saved from previous installations of this device. Sometimes a New Hardware Wizard will open for a new device and may ask for a driver. If you need to install a driver that is not on your computer, you can download the latest driver from the hardware manufacturer's website.
1. In the device Properties dialog box, click the Driver and then click the button Delete. Follow the instructions.
2. Restart your computer.
3. Open Device Manager and in the menu Action select team Update hardware configuration. Follow the instructions.
Revert to the last successful registry configuration.

The feature is a recovery option that you can use to start your computer with the most recent working settings. Function Loading Last Known Known Configuration Restores all registry element values and driver settings that were in effect in the last configuration in which the boot was successful.

Code 21

The device is removed from the system. (Code 21)

Solution

This error means that Windows is in the process of removing the device. However, the device is not completely removed yet. Here are several methods that may help resolve the problem.
1.Wait a few seconds, then press the key F5 to update the view device Manager.
2. If the problem persists, restart your computer. Click the button Start, select Shutdown Shut down Windows to restart the computer.

Code 22

This device is disabled. (Code 22)

Solution

Enable your device using Device Manager.

In Device Manager, click Action and then select Turn on. This starts the wizard Turning on devices. Follow the instructions.

Code 24

The device is missing, does not work correctly, or not all drivers are installed for it. (Code 24)

Cause

The device is not installed correctly. The problem may be a hardware failure or the need to install a new driver.

Devices are in this state if they have been prepared for removal. After removing the device, this error disappears.

Solution

Remove the device and this error will be resolved.

Code 28

Drivers for this device are not installed. (Code 28)

Solution

Driver installation

You may need to specify the path where the driver is located. The driver may be included with Windows. If you need to install a driver that is not on your computer, you can download the latest driver from the hardware manufacturer's website.

In the Device Properties dialog box, select the Driver and then click Update driver, to start it Hardware Update Wizard. Follow the instructions to install the driver.

Code 29

This device is disabled because the software built into the device did not report required resources. (Code 29)

Solution

Enable this device in the BIOS.

Enabling the device in BIOS

Allow this device to operate in BIOS settings devices. Consult your hardware documentation or your hardware vendor for information on how to make these changes.

Code 31

This device is not working properly because the device drivers could not be loaded. (Code 31)

Solution

Driver update

In the device Properties dialog box, on the Driver click the button Update driver, to start it Hardware Update Wizard. Follow the instructions to update the driver.

Code 32

The driver (service) for this device has been disabled. An alternative driver may provide this functionality. (Code 32)

Cause

This driver has been disabled in the registry.

Solution

Reinstall the driver for this device. If this does not help, you may need to change the device startup type setting in the registry.

You may need to specify the path where the driver is located. The driver may be included in Windows. Also, driver files may have been saved from previous installations of this device. Sometimes a New Hardware Wizard will open for a new device and may ask for a driver. If you need to install a driver that is not on your computer, you can download the latest driver from the hardware manufacturer's website.
1. In the device Properties dialog box, click the Driver and then click the button Delete. Follow the instructions.
2. Restart your computer.
3. Open Device Manager and in the menu Action select team Update hardware configuration. Follow the instructions.

Code 33

Windows cannot determine what resources are needed for this device. (Code 33)

Solution

An error occurred in the translator that determines the type of resources required for this device.

Set up your equipment. If tuning your hardware doesn't help, you may need to replace it.

Setting up or replacing equipment

If the problem is not resolved by using the troubleshooting wizard, configure or replace the device. Contact your device vendor for more information about setting up and replacing your device.

Code 34

Windows cannot determine the settings for this device. Refer to the documentation that came with the device and use the Resources tab to configure the configuration. (Code 34)

Solution

Set up your device manually. This content is intended for advanced users.

The device requires manual configuration. For instructions on manually setting up your device, see your hardware documentation. Or contact your supplier for these instructions. After setting up the device itself, you can use the tab Resources in Device Manager to configure resource settings in Windows.

Code 35

Your computer's firmware does not contain enough information to properly configure and use this device. To use this device, contact your computer vendor for updated firmware or BIOS. (Code 35)

Cause

The Multiprocessor System (MPS) table that stores resource assignments for the BIOS is missing a section for the device being used and needs to be updated

Solution

For BIOS updates contact your supplier.

Code 36

The device requires a PCI interrupt and is configured to require an ISA interrupt (or vice versa). Use the program system settings computer to reconfigure interrupts for this device. (Code 36)

Solution

Interrupt request (IRQ) conversion failed. Change the settings for IRQ reservation.

This content is intended for advanced users.

Changing settings for IRQ reservation

For more information about changing BIOS settings, see your hardware documentation.

You can also try using the program BIOS settings to change the IRQ reservation settings (if the corresponding functions are available). The BIOS may reserve certain IRQs for PCI or ISA devices.

Code 37

Windows cannot initialize the device driver for of this equipment. (Code 37)

Solution

The driver returned an error while executing DriverEntry. Reinstall drivers for this device.

Removing and reinstalling the driver

Uninstall the driver from Device Manager, then search for new hardware to reinstall the driver. You may be prompted to provide the path to the driver. Windows may contain built-in drivers or driver files that were installed during device setup. However, sometimes the Found New Hardware Wizard opens and may ask for a driver. If a driver is required, you can try downloading latest driver from the equipment manufacturer's website.
1. In the Device Properties dialog box, select the Driver and then click Delete. Follow the instructions.
2. Restart your computer.
3. Open Device Manager, click Action, then select Update hardware configuration. Follow the instructions.

Code 38

Windows cannot load a device driver for this hardware because previous version The device driver is still in memory. (Code 38)

Solution

The driver cannot be loaded because a previous version is loaded. Restart your computer.

Using the Troubleshooting Wizard

If the troubleshooter is not already running, run it now.
1. In the Properties dialog box for the device, click the Are common.
2. Click Troubleshooting, to start it Troubleshooting Wizard. The wizard will ask a few simple questions and provide a solution to the problem based on the answers received.
3. Follow the troubleshooting steps suggested by the wizard.

Restart your computer.

On the menu Start select team Shutdown Shut down Windows to restart your computer.

Code 39

Windows cannot load a device driver for this hardware. The document may be damaged or missing. (Code 39)

Cause

There are several reasons for error code 39.
- Absent required driver devices.
- The required binary file is damaged.
- Problem with the I/O process.
- A driver that references an entry point to another binary cannot be loaded.

Solution

Reinstall drivers for this device.

Removing and reinstalling the driver

Uninstall the driver from Device Manager, then search for new hardware to reinstall the driver.

You may be prompted to provide the path to the driver. Windows may contain built-in drivers or driver files that were installed during device setup. However, sometimes the Found New Hardware Wizard opens and may ask for a driver. If a driver is required, you can try downloading the latest driver from the hardware vendor's website.
1. In the Device Properties dialog box, select the Driver and then click Delete. Follow the instructions.
2. Restart your computer.
3. Open Device Manager, click Action, then select Update hardware configuration. Follow the instructions.

Code 40

The hardware cannot be accessed because its service information is missing from the registry or is not recorded correctly. (Code 40)

Solution

The information in the service registry key for this driver is incorrect. Reinstall drivers for this device.

Removing and reinstalling the driver

Uninstall the driver from Device Manager, then search for new hardware to reinstall the driver.

You may need to specify the path where the driver is located. The driver may be included in Windows. Also, driver files may have been saved from previous installations of this device. Sometimes a New Hardware Wizard will open for a new device and may ask for a driver. If you need to install a driver that is not on your computer, you can download the latest driver from the hardware manufacturer's website.
1. In the device Properties dialog box, click the Driver and then click the button Delete. Follow the instructions.
2. Restart your computer.
3. Open Device Manager and in the menu Action select team Update hardware configuration. Follow the instructions.

Code 41

The driver for this device was loaded successfully, but the device itself was not detected. (Code 41)

Solution

This problem occurs when you install a driver for a device that is not a Plug and Play device, but Windows cannot find the device. Here are several methods that may help resolve the problem.

If the troubleshooting wizard does not resolve the issue, try one of the following:
- If the device has been removed, remove the driver, connect the device and press the button Update hardware configuration to reinstall the driver.

If the device was not removed, the driver files may be out of date. In this case, update the driver in Device Manager. In the device properties dialog box, click on the Driver button Update driver, to start it Hardware Update Wizard. Follow the instructions to update the driver.

If your device is not a Plug and Play device, you may need to install
newer driver version. To install devices that do not support Plug and Play, use Hardware Installation Wizard. Click the button Start and select Execute. In the "Open" field, enter the command hdwwiz.cpl.

Code 42

Windows cannot load the device driver for this hardware because a duplicate device is already installed on the system. (Code 42)

Solution

A duplicate device has been detected. This error occurs when the bus driver incorrectly creates two subprocesses with the same name (bus driver error) or when a device with serial number discovered in a new location before it was removed from the old location. This problem can be resolved by restarting your computer.

Restart your computer.

On the menu Start select team Shutdown, then select an item in the dialog box Shut down Windows to restart your computer.

Code 43

The device has been stopped because it reported problems. (Code 43)

Solution

One of the drivers that controls the device has notified the operating system that an error has occurred in the device.

If you have already run the Troubleshooting Wizard, see your hardware documentation for more information about diagnosing the problem.

Code 44

An application or service has stopped running on this device. (Code 44)

Solution

Restart your computer.

On the menu Start select team Shutdown, then select an item in the dialog box Shut down Windows to restart your computer.

Code 45

IN currently This device is not connected to the computer. (Code 45)

Solution

This error occurs when a device that was previously connected to the computer is no longer connected. To resolve this issue, connect your device to your computer.

This situation does not require intervention. This code error is used only to indicate the disabled state of the device and does not require any action to correct the error. The problem is resolved automatically when the corresponding device is connected to the computer.

The following information is intended for advanced users.

If Device Manager starts with environment variable DEVMGR_SHOW_NONPRESENT_DEVICES for which the value is set 1 (which means show these devices), then all previously connected devices (NONPRESENT) are shown in the device list and given this error code.

Code 46

This device cannot be accessed because operating system is in the process of being completed. (Code 46)

Solution

The device is missing because the system is shutting down.

This situation does not require intervention. The device should work correctly the next time you turn on the computer.

This error code appears only when enabled Checking drivers, and all applications have already completed their work.

Code 47

Windows cannot use the device because it was provisioned for secure removal but was not removed from the computer. (Code 47)

Solution

You can use the following methods to resolve this issue.

Reconnecting the device

This error code only occurs when the user uses the Safely Remove app to prepare the device for removal or presses the physical eject button.

Connect your device to your computer

Disconnect your device from your computer, and then reconnect it.

Restart your computer.

Make sure your device is properly connected to your computer, and then restart your computer. Click the button Start, select Shutdown, then select in the dialog box Shut down Windows to restart the computer.

Code 48

The software for this device has been blocked because it is known to have problems running on Windows. Contact your supplier for a new driver. (Code 48)

Solution

Update your driver.

To obtain latest version driver or updated driver, contact your hardware manufacturer. Then install the driver on your computer.

Code 49

Windows cannot start devices because the system hive is too large (exceeds the registry size limit). (Code 49)

Cause

The system hive has exceeded its maximum size and new devices cannot work until the size is reduced. The system hive is a permanent part of the registry associated with a set of files containing information about the configuration of the computer on which the operating system is installed. Customizable items include apps, custom settings, devices, etc. The problem may be individual devices, which are no longer connected to the computer, but are still present in the list of the system hive.

Solution

You can use the following methods to resolve this issue.

This content is intended for advanced users.

Removal unused devices

To resolve this issue, first try removing devices that you no longer use.
1. Set up Device Manager to view devices that are no longer connected to your computer.
a) Press the button Start and select Execute.
b) In the “Open” field, enter the command cmd. A command prompt window will open.
c) B command line enter the following command and then press the key ENTER:
set devmgr_show_nonpresent_devices=1
2. In Device Manager, click View and then select the command Show hidden devices . Devices that are not connected to the computer will be displayed.
a) Select the device you want to remove.
b) In the Device Properties dialog box, select the Driver and then click Delete. Follow the instructions.
c) Restart your computer.
3. Remove devices that are no longer used.
4. Check the Properties dialog box for this device in Device Manager to see if the problem is resolved.

When connected to your computer or laptop mobile phone, flash drive, external hard drive, printer, scanner or any other device via the Universal Serial Bus, you may encounter a very common error - USB device not recognized with the comment “One of the devices connected to this computer is not working correctly or cannot be detected.” It is found both in Windows 7 and on the most modern version of the Microsoft operating system - Windows 10. It looks like this:

In English versions this is the “USB Device Not Recognized” error:

Why this error appears and what ways there are to fix and eliminate it - we’ll talk today.

Reason 1. Cables, extension cords and hubs

Poor quality of cheap USB cables, adapters and splitters (aka “hubs”) are the most common source of various problems for devices connected via a universal bus. Therefore, when the error “USB device not recognized” appears, the first thing you should try is to exclude the intermediate link in the video of the extender or hub. That is, we connect a flash drive, 3G/4G modem and similar things directly to the USB port on the computer’s motherboard. The front connectors on the system unit case are also not suitable because they are also often the cause of malfunctions, which means you shouldn’t “trust” them.

In the case of a printer or scanner, pay attention to the integrity of the cable. If there is visible damage, use a different cable. It is inexpensive and will not stretch your budget at all.

Reason 2: Faulty USB port

The second very common cause of problems with work external devices- physical damage or even breakdown of the USB port. It’s a paradox, but often people who wash themselves two or three times a day do not at all monitor the cleanliness of the equipment with which they interact every day. They especially suffer from this system units. They often like to be “pushed” into the dustiest and dirtiest corner. As a result, dust accumulates in all possible places, including USB ports. I even happened to discover mummies of various beetles and insects there. And dirty contacts don’t help either. stable work connector. In addition, there were cases when users plugged in a mouse, printer or flash drive so zealously that they simply broke the port.

Therefore, if the error “One of the devices connected to this computer is not working correctly” appears, carefully inspect the connectors for dirty contacts or damage. Try switching to the neighboring one and see if there are any errors on it. In addition, it is worth opening Device Manager and looking at USB controllers— is any of them marked with a red cross? This usually means that it is out of order and requires repair. motherboard. Sometimes, however, installing an additional controller in a PCI slot helps.

Reason 3. Drivers and software failure

Problems when installing a driver for a particular gadget is another possible reasons emergence Windows errors"USB device not recognized." If you open Device Manager, then in the list that appears you will see a yellow triangular icon in the list of controllers.

In this case, it will be signed as “Unknown USB device (enumeration failure)”. This may happen because the operating system cannot find suitable drivers (for example, when upgrading the OS to Windows 10), or a conflict arises between already installed and new ones. To correct the situation, you must first find the latest version of drivers for the connected device on the Internet, download and try to install.

If you don’t know what to look for specifically, then go to the device properties, open the “Details” tab and select the “Hardware ID” property from the list.

Identification lines will appear in the field below. We find two identifiers in them - VID And PID. We remember or write them down. We go to the Internet (for example, to the site pcidatabase.com) and look for detailed information about connected removable disk, phone, mouse, printer, scanner, etc. And then you need to search and install current version drivers.

But if you think that the “USB device is not recognized” error is due to a possible conflict between old and new drivers, then to eliminate it you will have to completely remove both. This is done either again through the Device Manager, or using third-party utilities. After you clean the system from the faulty software, you will need to install the latest version and check the operation of the device.

Reason 4. Malfunction of the device itself

Yes, unfortunately, such troubles happen. This happens especially often with flash drives and external hard drives. Their controller either completely fails, or the area on which the microprogram for the chip is written is faulty. It cannot boot and therefore the computer does not understand what it is and labels it as “Unknown USB device”.
Check it works on another computer. If the same error appears there, then take it to a service center or to the trash. For example, it crashed for me this way wireless mouse. On another PC it worked without problems. Most likely there was a conflict between her radio module and something else in the room.
Sometimes a malfunction may occur due to insufficient power. This happens with external hard HDD drives. In this case, they must be connected not through one, but through two ports at once. There is a special cable included for this purpose.

Note: If, when you turn on various equipment or gadgets via USB, your computer or laptop begins to behave strangely: it turns off, reboots or freezes, then immediately unplug it and take it to a service center. As a rule, this indicates a malfunction of the connected device itself, and further independent diagnostics can lead to even more dire consequences.