Start the PC and press F8.
Use the arrow keys to highlight Last Known Good Configuration, and then press ENTER.
Use the arrow keys to highlight an operating system, and then press ENTER.
Choosing Last Known Good Configuration provides a way to recover from problems such as a newly added driver that may be incorrect for your hardware. It does not solve problems caused by corrupted or missing drivers or files.
When you choose Last Known Good Configuration, Windows 2000 restores information in registry key HKLM\System\CurrentControlSet only.
Any changes you have made in other registry keys remain.