When you try to rename a system file in Windows 2000 Explorer, you receive an error indicating that the file is being used by windows?
Example: When you attempt to rename Kernel32.dll, you receive:
Cannot rename Kernel32.dll: The specified file is being used by Windows.
To work around this behavior:
1. open a CMD prompt.
2. Switch (CD) to the folder that contains the file you wish to rename.
3. Use the REN command:
REN kernel32.dll kernel32.old