If you are getting a error message like
“LSA Shell (Export Version) has encountered a problem and needs to close. We have created an error report that you can send to help us improve LSA (Export Version).”
Then most probably you are infected with a virus known as Sasser virus.
To fix this problem Download and install the security patch from http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx
Also, update your virus definitions and scan the entire hard drive to locate and clean infected files. To stop a PC from shutting down in Windows XP, when you get the 60-second countdown, go to Start > Run, type ‘shutdown -a’ and press [Enter]. You’ll now stay connected to the Internet and download the patches.
It is highly recommended to keep an updated anti virus in your system as a protection from these types of virus infections
