How to fix 'USB Device not recognized' by the computer

How to fix 'USB Device not recognized' by the computer

The main reasons why the computer cannot recognize the USB flash drive are as follows:

Reason 1: There is a problem with the computers USB interface

Test method: If we want to know whether there is a problem with the computer's USB interface, we can use multiple USB flash drives for testing. If the computer can recognize different USB flash drives, it turns out that there is no problem with the computer's USB port.

Reason 2: There is a problem with the USB flash drive

Test method: First of all, ensure that the computer's USB port is in normal use. Secondly, insert the USB flash drive into different computers. If the USB flash drive cannot be recognized by different computers, it proves that the USB flash drive is damaged.

Reason 3: There is a problem with the USB device driver

Test method: Right-click on "This computer" on the desktop, and select "Manage" in the pop-up menu item to enter. Check whether the "Universal Serial Bus Controller" in the "Device Manager" has a yellow exclamation mark. There is a problem with the USB driver, and the driver needs to be uninstalled at this time.


  1. Right-click the device driver with a yellow exclamation mark, and right-click "Update Driver Software". At this time, the computer will pop up a window, select "Automatically search for updated driver software", this time the computer will automatically search for us For the latest driver software of the relevant device, select "C:\WINDOWS\SYSTEM32\DRIVERSTORE\" in the next installation location, and finally follow the computer prompts to update the device driver, and the computer can recognize the USB flash drive
  2. Or use the "drive management and maintenance tool" to scan the computer and follow the software prompts to solve the corresponding problems.

Another thing to note is that in win7 system, we can also take another approach. Still open the device manager interface of the computer, right-click and select the "USB Root Hub" option, and finally select "Disable", and then "Enable" again.

If the above method still cannot be solved, we still right-click on "USB Root Hub" and select "Properties" to enter. Select "Power Management" in the properties window, uncheck the "Allow the computer to turn off this device to save power", and finally click "OK" to restart the computer.

Reason 4: The computer has a virus

Solution: Open the anti-virus software in the computer, check and kill the computer completely, and solve the corresponding problem.

In view of the problem that the computer cannot recognize the USB flash drive device, we need to carry out a step-by-step investigation according to the above test methods, so that we can understand the problem and prescribe the right medicine. We also need to test computers and USB flash drives on time in work or life, try not to use our own USB flash drives on public computers, to avoid intrusion with external viruses.

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