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Problem
The computer does not detect a connected USB device.
Symptoms
USB device does not appear.
Error message shows "USB Device Not Recognized."
Device disconnects repeatedly.
USB device works on another computer.
Device is recognized briefly, then disconnects on its own.
Possible Causes
Damaged USB port.
Faulty USB cable.
Missing drivers.
Power issues.
Corrupted USB settings.
Faulty device.
USB selective suspend setting turning off power to the port.
Resolution
Step 1
Disconnect and reconnect the USB device.
Step 2
Try another USB port.
Step 3
Restart the computer.
Step 4
Update USB drivers.
Step 5
Check Device Manager for errors.
Step 6
In Power Options, disable "USB selective suspend" to prevent Windows from cutting power to USB ports to save energy.
Step 7
Test the device on another computer.
Step 8
Replace damaged cables or devices.
Prevention
Safely eject USB devices.
Avoid forcing USB connections.
Keep USB ports clean.
Use quality USB accessories.
Avoid using USB hubs for high-power devices like external hard drives; connect directly to the computer when possible.
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