When the computer pops up the "USB device not recognized" prompt, it is usually because of hardware, driver or system setup issues that the system cannot recognize the USB device. 1. First check the USB device and interface itself, try to replace the computer or USB cable to eliminate device damage or interface problems; 2. Restart the computer and re-plug and unplug the device, try different USB interfaces, especially the host native interface; 3. Update or reinstall the USB driver, uninstall the relevant USB devices through the Device Manager and restart the computer to automatically reinstall the driver; 4. Check the power management settings and uncheck "Allow the computer to turn off this device to save power" to ensure stable power supply. In most cases, follow the above steps to resolve the problem without immediately suspicion of system or hardware failures.

The prompt "USB device not recognized" pops up on the computer, which is one of the common problems in Windows systems. This prompt usually means that the system cannot properly identify the plugged USB device. There may be something wrong with the hardware, driver or system setup. Don't worry, this situation can be solved most of the time.

1. Check the USB device and interface itself

This is the easiest to ignore but also the most basic link. Confirm first:

• Is the device normal? Try plugging it into another computer to see if there is any response.
• Is there any problem with the USB cable or interface: Some data cables only support charging but not transmit data.
• The USB port of the host is plugged in, rather than the front panel or other expansion interface (sometimes the front interface is insufficiently powered).

If other computers can recognize it, the problem is most likely in the current computer; if it does not recognize it, it may be that the device is broken or there is a problem with the cable.

2. Restart the computer and re-plug and unplug the device

This problem is sometimes just a temporary system glitch. After shutting down and then turning on the USB device, it will be able to return to normal in many cases. You can also try changing the USB socket, especially from USB 3.0 to USB 2.0.

Also note:

• Do not plug it in the hub, just plug it into the USB port of the host.
• Make sure the device is completely inserted and not loose.

3. Update or reinstall the USB driver

You can check whether a yellow exclamation mark appears in the device manager. If so, it means that there may be a problem with the driver.

The operation steps are as follows:

• Press Win X and select Device Manager
• Find "Universal Serial Bus Controller"
• Right-click on the USB-related device (such as USB Root Hub) and select "Update Driver" or "Uninstall Device"
• After uninstalling, restart the computer, the system will automatically reinstall the driver

If you are not sure which driver has problems, you can uninstall all the USB words inside and then restart.

4. Check the power management settings

Sometimes, in order to save power, the system will limit the power supply of the USB interface. You can check this way:

• Also open "Device Manager"
• Find a USB device in the "Universal Serial Bus Controller"
• Right-click → Properties → Power Management
• Remove the "Allow the computer to turn off this device to save power"

This setting will affect the stability of the equipment's power supply, especially for some peripherals that require continuous power supply.

Basically these common methods

When encountering "USB device not recognized Windows", do not think about system reinstallation or motherboard problems as soon as you come up, and first check the device, interface, driver and power settings in order. In most cases, it is not a big problem, but it is easy to misjudgment because of skipping the steps.

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