What to do if the computer does not recognize the device. The computer does not see the USB flash drive via USB or an unidentified device.

"USB device is not identified" - Pretty daily and common problem. In most cases, it is not critical, so it will not be difficult to fix everything in a couple of minutes.

The reason for this error can be in a USB port, cable, incorrect work Connected device or crash drivers. And this is an incomplete list. To begin with, you should make sure that the error is non-serious and can be easily eliminated.

• Try disable all the extra devices, and then connect the desired one.
• Use another computer port.
• Check the integrity of the cable and ports. If possible, use the other cord.
• To exclude a device malfunction, try connecting it to another computer.
• You can also restart both devices.

If none of the options affected, it means that the problem is a little more serious and requires some manipulations.

Method 1: Driver Update

In most cases, updating drivers can help eliminate the problem. The system can automatically load inappropriate components, especially if your PC does not support or does not have drivers for windows 10.

1. Clamp Win + S..



2. Enter the search field "Device Manager".



3. Open the first result.
4. Open "USB Controllers" Or another section in which your device can be. The driver selection depends on the cause of the problem.



5. Right click on the required object and find "Properties". The device can be indicated as an unknown.



6. Go to the tab "Driver".

   

   • Option "Update ..." makes it possible to install driver updates yourself or automatically.
   • Function "Roll back" It is used if the device driver does not want to work correctly.
   • "Delete" Used to fully reinstall. After removal, you need to open "Act" — "Update Equipment Configuration". However, you can use other means to update.

Also check whether in the section "Power Management" Bottling on the contrary "Allow shutdown ...". If there is, remove it.

Reinstallation or rollback of drivers should be enough, but if it does not help, then go to the next method.

Method 2: Installing Updates

Often due to the lack of necessary updates in Windows 10, errors associated with USB devices may appear. In this case, you need to download and install the necessary components.

Usually updates are loaded automatically, but in some cases it may not happen. If you find problems with download or installation, we have on the site there are appropriate instructions for eliminating them.

Sometimes when connected to a computer external devices For a USB port, users encounter an error "USB device is not identical." In this error, there is little good, since the connected device, be it mouse, the keyboard or flash drive becomes completely useless. But most often it happens that the error occurs suddenly, although before that the connected device did not give out any signs of problems. The reasons for the appearance of an error "USB device is not recognized" may be somewhat, but usually 90 percent of cases they are hardware. In addition, sometimes the problem is in.

Breakdown device

First of all, you need to make sure that everything is in order with the device. If you have such an opportunity, try connecting it to another computer. Gives an error and on other PCs? Then the case in the device itself and you will remain either replacing it or pass into repair. If the error appears periodically, most likely its cause is bad contacts. Such malfunctions are often found with long-term use of wired keyboards and mice. Permanent cable bending leads to damage to one of the internal wires and as a result, the device is disconnected.

USB port breakdown

The reason may also be bad contacts or failure of the USB port controller on motherboard Computer. Opening the Device Manager, see if any of the USB controllers are not marked with a red icon (looking for errors in properties). Solving the problem is radical - repair or replacement of a damaged controller. Alternatively, you can connect the device to another port.

Using cheap USB hubs

USB-hub is a wonderful invention, but you only need to use high-quality, preferably with an autonomous power supply of the device. Unfortunately, now the market is flooded with cheap Chinese fakes, which are either incompatible with a particular PC, or quickly fail. In general, the smaller you use adapters, the better the longer the probability of the occurrence of a hardware or software conflict.

Important note: If, when you connect a USB device, the computer is rebooted, or a system drop in BSOD is observed, immediately stop all attempts to re-connect the device, as this can lead to a serious breakdown of computer components!

Software errors

Problems with drivers - Another possible reason for the appearance of the error "USB device is not identical". The characteristic feature of the driver problems is the presence of a yellow icon in the "device management" snap-in opposite the problem device. It is treated with reinstalling or updating the driver, however, it is advisable to make sure that the error is not caused by the conflict with the drivers of previously connected similar devices. After all, even if the old device is no longer used, its driver is still in the system and can cause conflicts with other drivers. In any case, the old drivers of unused devices are desirable to remove, for example, using a specialized utility

Surely many users when connecting a USB drive, third-party hard drive or any other equipment, could see the notification that an error has occurred on their screens uSB device Not recognized. It can happen on all recent versions Windows Ourser and manifest with USB 2.0 and 3.0. Eliminate this error can be quite simple.

Exists great amount reasons that contribute to the appearance of an error when the OS does not recognize the USB flash drive. In addition, the troubleshooting options are also quite a lot. It is worth noting that ways to solve the problem are individual for each method, so for someone they can come up, but for the other there is no.

The first manipulations when the error occurs "USB device is not identical"

First of all, if you have the problem of connecting a USB drive, printer, mice or keyboard, it is necessary to check the device itself to the PC.

In this case, you must try to connect this USB device to a third-party PC or a laptop if there is such an opportunity and check its performance. If the device does not work, it means that it is safe to say that it causes the error that it is precisely it, and to look for other reasons meaningless. In this case, you need to check whether the USB device is connected correctly. You can connect it to another port, and if this does not eliminate the error, then the drive itself needs to be checked.

In addition, there is another option that you can apply. It is suitable in the case when the device has been working correctly before that moment. It can also be used when it is impossible to use the first method.

In this case, you need to disconnect the drive that the computer does not recognize and turn off the PC. Then you need to remove the power cord from the outlet, press and hold the computer's turning button for a few seconds. As a result, all the balances of the charge will disappear from the motherboard and all elements of the computer.

In addition, there is another way that will help much faster than everyone else. If a stationary computer is used, a lot of different equipment is connected to its front panel, it is necessary to turn off part of them, which is not needed in this moment, And the device that causes an error is connected to the back of the PC. Perhaps it will help to eliminate the problem, and next steps Do not need.

It is worth noting that if the USB device has its own power source, it must be connected or to make sure it is connected. In addition, it is necessary to check the performance of the power supply.

USB Device Manager and Driver Manager

Also to correct the error when the USB device is not recognized by the PC, you can use the device manager of the seventh or eighth version of the Operations. This option suggests several methods of eliminating the problem that can work in a specific situation, and maybe nothing will suit.

First of all, you need to go to the Device Manager. Perform it can be very simple way. You must press the Win + R combination on the keyboard and write Devmgmt.msc in the "Run" window, and then press ENTER.

In most cases, the unrecognized device can be located in two departments of the dispatcher. It can be "USB controllers" and "other devices". The last item may be called "Unknown Devices".

If an unknown device is displayed in "other devices", then you can connect to the network and click on it with PCM. In the dropping menu, you must specify "Update Drivers". In this case, the operating system can independently install everything you need. If this does not happen, you can try to update the drivers yourself.

If the unknown device is located in the USB Controllers list and designated by an exclamation mark, then you can perform a pair of action. You need to click the PCM on the device and select "Properties" in the menu. After that, in the "Driver" section, you must click on "roll back", if possible. If it does not work, then you need to eliminate the driver by pressing the "Delete" button.

Next is required in the device manager, click on "Action". Here you should select "Update Device Configuration" and check if the PC is a USB device recognizes.
In addition, you can go to the parameters of each USB device with the Generic USB HUB names, the root USB hub and in the "Power Management" section to remove the mark with "Allow the shutdown of this device to save the power."

If this does not bring the desired result, then you can try another method that can be useful for the "eight". For all devices connected to the PC, you need to perform several manipulations in order.

It is necessary to click on each PCM and specify "update drivers". After that, you should specify "Search drivers on this PC". Then you need to click on "Select the driver from the list already installed." This list should display a compatible driver.

After that, you need to choose it and click "Next". As a consequence, reinstalling the driver for the USB controller will begin to which the device is connected. This can eliminate the error.

USB 3.0 devices are not recognized in the eighth version of Windows

On the laptops with the Windows Operation 8, such errors are quite frequent. It is mainly manifested for drives using USB 3.0.

You can get rid of this problem by changing the settings of the laptop power circuit. You need to go to the control panel and select "Power Supply". Here you need to find the applied scheme and click "Change additional settings Food. After that, in USB settings, temporary shutdown should be deactivated. USB ports.

These are the main causes and methods to eliminate the problem when the system does not recognize the USB device. Surely some of them are suitable for eliminating the error.

Problem: When connecting the device in the USB port, an error appears

The USB device is not identified one of the USB devices connected to this computer work incorrectly, and Windows cannot be recognized.

This error may occur when connecting any device: flash drives, external hard disk, Wi-Fi adapter, smartphone, printer, scanner.

First of all, you need to try to understand whether the device is regularly. If there is such an opportunity, connect it to another computer. In the event that the device works correctly in another computer, read further about possible reasons Errors.

Causes of errors and elimination methods

1. Bad contact

This often happens when connecting old phones with old data cables, because Contacts on connectors and plugs over time are oxidized and simply polluted.

Tip: Clean the gadget connector and connecting cable plug.

2. The device is connected via poor quality (or too long) cable or via USB extension

Most often with cheap cables (usually they are gray, thin and without ferrite filters), the Hewlett-Packard printers do not work well. And in offices, besides, they love to use long cables.

Tip: Use only high-quality and original USB cords. If possible, connect the device to the port directly, avoid using extension cords.

3. Additional power cable for hard disk is not connected.

External 2.5-inch hDD At half past cases, it is capable of working without connecting additional. Nutrition. However, to ensure trouble-free operation, it is recommended to connect both plugs.

Tip: Connect additional meals.

Remember that 3.5-inch external hard drives Work with power supply!

4. The device is connected to the port on the front panel

This item applies only to stationary computersbecause In the laptops there are no differences in ports.

In the front ports, devices are poorly working, particularly sensitive to the quality of the connection and stability of the port voltage.

Tip: Connect the device to the rear panel of the computer and check it out.

5. Too many USB devices are connected to the computer at the same time.

This can cause both the voltage drop in ports and conflicts of devices among themselves.

Tip: Disable all devices. Restart the computer. Connect only a problem gadget to the port on the rear panel and check it with its performance.

6. Problem with compatibility or device driver

This sometimes happens when connecting old mobile phones (Drivers to which are only under Windows XP) to modern computers.

Advice:

1. make sure the device is designed to work with the current OS. Download the driver on the official website and install it in the system. In Windows 7-10, you can try to perform automatic search Drivers ().
2. Disable temporary USB port.
3. Disable the USB device shutdown.

How to prohibit temporary port shutdown

Open:

• Control Panel
• Power Supply
• Setting the power scheme (current profile)
• Change extra options Nutrition.

In the window that opens Power Supply:

• Open item USB settings
• IN Temporary Disable Parameter USB Port Select Value Prohibited
• Click OK.:

How to prohibit disabling device for energy savings

• Open Device Manager (win + R, Devmgmt.msc, Enter)
• Expand section USB controllers
• Call properties Root USB hub or Generic USB Hub:

• Uncheck the checkbox Allow disconnecting this device to save energy.
• Click OK.:

Hello everyone! Not everyone, but most users have met with such a problem as a "system does not recognize the USB device", let's understand why it does not recognize and how this problem is eliminated.

Consider such a situation as a complete system failure to recognize USB devices. So, you connect any USB device (some flash drive), but instead of access, you receive a message: the USB device is not identified. One of the USB devices connected to this computer is incorrect, and Windows cannot be recognized. By the way, there are often cases when I first worked fine, and the problem began to occur with time. Question: why, in fact?! What is this suddenly the system refuses to perform your team?

First, you should check the adequacy of the work of the USB device itself: can the joint with it, and not with the system. Try to test the device on another computer. But if it is not determined there, then the problem is in it. But if on another computer, the device is determined without any problems, then the problem is in your hardware. Most likely, you could incorrectly disable the device when the last time was taken out.

Usually, to retrieve the USB device, it is necessary to conduct a certain disconnection algorithm to the device itself, and only then when the system is issued the message "Now the device can be removed," the time it is time to perform this action. It also happens that the drivers in the system flies.
In any case, if the problem is not with the carrier, i.e. USB device, it is easily solved. The main thing, of course, know exactly how to do it. So how?

Let's briefly consider standard methods elimination of this problem.

1. The simplest thing is the usual reboot of your computer.

2. In the Device Manager, update the equipment configuration.

3. In the Device Manager, delete all USB controllers and restart the computer.

4. In the device manager, update USB controller drivers.

5. In the root USB hubs, remove the tick from the Power Management item (allow you to disable this device to save energy).

There is another way, here we will talk about it in more detail. There is one file that is called Infcache.1 - it is necessary for you. This file contains information about system Drivers. Depending on the OS, the file search address looks like this: for Vista - C: WindowsINF; For Windows 7 - C: Windows / System32 / DriverStore. That is, the DriverStore folder is an analogue of the Infcache.1 file. In short, look for what you need and open the file.

Now look: if some failure occurred, then it is necessary to correct it. Find and delete a defective file: just scroll down the mouse wheel and look for the same file. Remove the problem file from the list. Do not be afraid: nothing terrible will happen, because when you repeatedly connect the system will automatically create a new (correct) file in this list.

Attention: Before deleting a file, turn off the USB device! And remember that the file can be hidden, so it must be done visible.

This can be done in the following way: Open Control Panel. Next, click on the button-button Service and choose line Folders settings (Buttons at the top of the folder). Window opens Folder properties. There you will see another three tabs. Your tab - View, Click on it and open. See a list where you should find a line Hidden folders and files. Just below you will see two more lines: Not and Show hidden files and folders.

By default, a function is enabled that prohibits display files and folders. And your task is to turn it on: Put the point opposite Show hidden files and folders and press Apply and OK. All: Now all your hidden folders Steel visible!

At this, I finish, everyone until new meetings.