1. Set the CLOCK in your BIOS setup.
2. Be sure your Windows 2000 is uptodate or it will be infected with a worm.
3. Be sure there is no worm with a second opinion virus scan from http://housecall.antivirus.com/housecall/start_corp.asp
4. An out of date BIOS could be an issue here. Update that after 1,2,3.