LSA Shell (Export Version) Error

Ok I got a stupid problem that I have seen many times on all the computers I seen.

When ever this window pop’s up saying LSA Shell Encountered an error you click Send error to microsoft or what not and a countdown pops up saying the computers gonna shutdown in 60seconds so i go to Start>Run> and type SHUTDOWN -A and it stops the countdown.

Now that I knwo how to stop the countdown I aint sure how to get rid of the LSA Shell Error and stop the countdown from comming up again.

Also I just installed windows on and today I just got my internet working again and as soon as the internet comes on Bamn!!!.

Anyways same thing happened on my brothers computer I just Installed SP2 For XP now his computer works really good really really good.

Any ideas on how to get rid of this problem without getting SP2?