WINDOWS SHUTDOWN "lsass.exe terminated, system will shutdown"

[pallavi]

Hello
on my computer i've been getting this message:

This system is shutting down. please save all work in progress and logg off. any unsaved changes will be lost. This shutdown was initiated by NT Authority/system.

MESSAGE
the system process 'C:\windows/system32\lsass.exe' terminated unexpectedly with status code -1073741819 and 128 the system will now shutdown and restart.

then it gives me 60 secs till it shutsdown

CPU takes 100% time for processing with no program running
the system has become dead slow.

please somebody help

 

[brady]

Run a repair on the OS.
If you have never done a repair on the OS before please post back before starting it.