Windows 10 USB Device Not Recognized Keeps Popping Up: Silencing a Repeating Error
A notification slides in from the corner, accompanied by the disconnect sound. A minute later it returns. When Windows 10 USB device not recognized keeps popping up, it can happen even with nothing judolbet88 obviously plugged in.
The message means a USB device announced itself but did not identify itself properly. Windows cannot work out what it is, so it reports a malfunction.
When the alert repeats, something is connecting and disconnecting over and over, and the task is to find which device or port is responsible.
What Usually Triggers It
Repeating alerts usually come from these:
- A faulty cable or a device with a loose connector.
- A damaged or dirty USB port.
- A device drawing more power than the port supplies.
- Corrupted USB controller drivers or aggressive power-saving settings.
Internal devices such as a laptop’s webcam, fingerprint reader, or card reader also use USB, so the culprit may not be visible.
First Steps to Try
Isolate the device by elimination.
- Unplug all USB devices, including hubs and charging cables.
- If the alert stops, reconnect devices one at a time, waiting a minute after each.
- When the alert returns, try that device with another cable and another port.
- Shut down, unplug the power, hold the power button for 30 seconds, and restart.
- Test the suspect device on a different computer.
A device that fails on two computers is faulty. A device that works elsewhere points to this PC’s port or settings.
If the Problem Continues
If the alert appears with nothing connected, check the system side.
- Open Device Manager and expand Universal Serial Bus controllers. Look for “Unknown USB Device (Device Descriptor Request Failed).”
- Right-click that entry and choose Uninstall device, then select Action > Scan for hardware changes.
- Open each USB Root Hub’s properties and, on the Power Management tab, untick “Allow the computer to turn off this device to save power.”
- In Power Options > Change advanced power settings > USB settings, disable “USB selective suspend setting.”
- Install the latest chipset drivers from the PC manufacturer.
Note which port the unknown device is attached to. A specific port that always fails may be physically damaged.
Protect Your Data First
If the failing device is an external drive, do not keep reconnecting it, as repeated power cycles can corrupt data. Avoid cleaning ports with metal tools. Use compressed air with the PC switched off.
The Bottom Line
A repeating USB alert is caused by one device or port making a poor connection. Unplug everything, reintroduce devices one by one, and adjust USB power saving. That approach identifies the offender in nearly every case.