I am having problems with my PC. The system started rebooting while I was trying to login yesterday. Since then, the system boots up till the Windows XP logo is displayed and starts rebooting. When I tried to go to "Safe Mode" the process stops at "Partition c:\Windows\ststen32\Drivers\Mup.Sys" and starts rebooting. This loop goes on. Can any one suggest how to repair/reinstall the XP professional edition.