lsass.exe system error

Hello,

I have an lsass.exe problem. In all the solutions I find on the net, people presume that you are still able to start your PC and end up on the desktop. My problem is that I can’t even get that far anymore (I am now working on a different PC).

Here’s what happens, I turn on my PC (power), Windows is trying to start up (I get the Windows XP pro sign with the cyclops horizontal bar going from left to right), than a black screen, and after a while a little window titled “ISASS.exe system error”, message “object not found”. The only thing I can do is accept (click on ‘ok’ or on the cross to shut down) and than the system starts all over again. Point is: I am completely unable to even end up in my PC. HELP ! Anybody can tell me what to do?