Computer Shuts Off With Lsass.exe Error
Question: My IBM laptop shuts down after 8 minutes saying Isass.exe error. What can I do? The computer comes back on, but has the same problem over and over.
Answer: This
 error may be  caused by a virus or spyware infection. That message is 
commonly caused by the Sasser Worm. I would run the Sasser removal tool
 from Symantec and see if it finds it on your system. I would also run 
some other virus and spyware scans to see what else you may have on your
 computer. Here is a link to the Sasser removal tool.
To prevent your computer 
from restarting you can click on Start, Run and then type in shutdown -a
 to abort the shutdown. Or you can boot into Safe Mode with Network 
support to see if that will allow the computer to stay running and  
still give you access to your broadband internet connection. Or you can 
download the removal tool, then boot into Safe Mode and run it.
While in Safe Mode you should run some other virus and spyware scans. You can start with Spybot, AdAware, Malwarebytes  and AVG since they are free.