Posted 11 November 2011 - 10:30 PM
I've spent two days trying to fix this computer. It was slowing down dramatically (its only one of those atom emachines with 1gb of ram, but still it should not be this slow). It had no real reason to be slow, so we removed norton and said that there's no point having virus protection if you cant use the computer. The computer sped up to a reasonable amount and I left.
My friend walks back upstairs, computer freezes, wont turn on anymore. It freezes at the windows logon screen, cant safe mode either. I assume the boot sector gets corrupted, so I put in the windows cd. The windows cd blue screens giving me the error message 0xc015000f - which is lsass.exe or one of the other critical services being corrupted ie the registry. Or the sasser worm, which I didnt think so. This error occasionally can be fixed by changing a drive from SATA mode to IDE mode, so I did that, which made the drive stop crashing before the windows screen, but now I can log onto windows. However, now it doesnt reach the authentication screen and lsass.exe comes up with a critical error and crashes, leaving nothing running on windows and the computer has to be hard reset.
I cant get into the drive to system restore it, so I run a prewin environment and replace the registry files manually, which led to nothing, lsass.exe still corrupted. If the registry isn't corrupted, bleep knows what's causing lsass to crash. I'm currently running a virus scan by reseating the drive in a separate computer, but I don't have much hope for that. Also, attempted a repair install which crashes in the middle of it every time.
Can anybody think of a next step? I feel like I've exhausted everything here.