my computer is shutting down

this is my first posting, hope this is enough information. have windows 2000 professional addition. when roaming the internet i often get the following message: this system is shutting down. shutdown initiated by NT Authority/System. C:\WINNT\System32\lsass.exe. terminated unexpectedly, code 128. Computer will now restart. A countdown then starts from 60. the computer then automatically shuts down and restarts. this can occur at any time, sometimes as often as every 15-20 minutes, or it may not happen for an hour or two. i have been using spybot, but the shutdowns have continued.

 

Is your AV program updated?? have you ran it?? This sounds like it may be sasser worm, IMHO. What AV program do you run?

EDIT: Star is just too quick!!

 

You can print these Sasser instructions from MS to use for Win2K:
http://www.microsoft.com/security/incident/sasser_print2000.asp