My PC is running Win XP Pro, after the Windows Xp loading screen finishes, it then has a lsass.exe-access denied pop-up box where it states "A process has requested access to an object, but has not been granted those access rights." It only has the option of clicking OK. After clciking OK, the PC resets and restarts this endless loop. Running windows in Safe Mode and any other possible way, I have not been able to fix this. I would rather not Format C: if anyone knows a solution to fix this, I would appreciate it greatly, thanks.