This article was previously published under Q258795
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
When you start your computer using the Safe Mode option, you may not have access to your mouse or keyboard, or both. However, if you start the computer normally, the devices work correctly.
Similar behavior may occur when you start the computer using the Safe Mode with Networking option.
NOTE: This applies to PS/2 mouse and keyboard.
This behavior occurs because of missing or corrupted registry subkey(s).
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Restore Subkeys for Safe Mode
To resolve this issue, restore the missing or corrupted subkey(s):
Obtain a copy of the missing or corrupted subkey(s) from a Windows 2000-based computer that is working properly (subkeys mentioned here are the same on all Windows 2000-based computers):
Click Start, click Run, type regedit.exe, and then click OK.