How to Fix Code 21 | SmartPCFixer Official Blog

Symtom: Windows is removing this device. (Code 21)

Resolution:

This error means that Windows is in the process of removing the device. However, the device has not yet been completely removed. Here are some things that you can try to resolve this problem.

Wait several seconds, and then press the F5 key to update the Device Manager view.

If that does not resolve the problem, restart your computer. Click Start, click Shut Down, and then select Restart in the Shut Down Windows dialog box to restart the computer.

Recommended resolution:

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To fix the problem, do one of the followings:

Double-click the SmartPCFixer icon on your desktop.
Select Start | All Programs | SmartPCFixer | SmartPCFixer