windows system32lsass.exe

[phil]

every time i start my computer i get a box with the above
in it and a code 1073741819. it gives me one minute to
close programs then shuts down my computer. does any one
have any idea whats causing it.

 

[Sharon F]

every time i start my computer i get a box with the above
in it and a code 1073741819. it gives me one minute to
close programs then shuts down my computer. does any one
have any idea whats causing it.

It sounds like the Sasser worm:
http://www.microsoft.com/security/incident/sasser.asp