'USB Device Not Recognized' error when plugging something in

Symptoms

• Notification specifically says USB Device Not Recognized
• Device doesn't appear in File Explorer or the relevant program
• May work fine in a different USB port or on another computer
• Sometimes accompanied by a repeated connect/disconnect sound

Likely causes

• CommonFaulty or damaged USB cableA worn or damaged cable is one of the most frequent and easily fixed causes.
• CommonUSB port issue on the computerA specific port can fail or become unreliable while others work fine.
• PossibleOutdated or corrupted USB controller driverDriver issues can prevent proper communication with connected devices.
• PossibleDevice itself has failed or is drawing too much powerSome devices, especially external hard drives, can fail in a way that specifically triggers this error.
• Less commonWindows USB selective suspend setting interferingThis power-saving feature occasionally causes devices to disconnect and fail to reconnect properly.

What to do

1. Try the same device in a different USB port on the same computer, ideally one connected directly to the motherboard rather than through a hub.
2. Try a different USB cable if the device uses a separate cable (like most external hard drives and many phones).
3. Test the device on a different computer if possible, to determine if the problem is with the device or with this specific PC.
4. In Device Manager, look under 'Universal Serial Bus controllers,' right-click each USB Root Hub, and check Power Management tab, unchecking 'Allow the computer to turn off this device to save power' if present.
5. Update USB controller drivers and chipset drivers from your PC manufacturer's website.
6. Uninstall all USB controllers from Device Manager (they'll reinstall automatically on restart) if the issue persists across multiple devices and ports.
7. If a specific device fails on multiple computers and cables, it has likely failed and needs to be replaced or professionally diagnosed if it contains important data.

Tools and parts

• Spare USB cable, if applicable

When to call a pro

If a device fails to be recognized on multiple ports, cables, and computers, and it contains important data, a data recovery professional may be able to help before you replace it.

Safety