Isass.exe 60 sec shutdown Pls Help

[vershen]

Hi i keep getting this mesage:

'instruction "0x77f5674b" reference memory at "0x909006e3" could not be read'...

and when i click ok this msg pops up:

"system32/Isass.exe' terminated unexpectedly with status code - 1073741819"...the pc automatically shuts down in 60secs.

Was told to run hijackthis and post the log file here please find it attached.

Oh... using XP PRO.

THANX!!!!!!!!!!!!!!!!!!!