Hello Trish, to start with run a disk check on your PC: My Computer>Right-Click you Hard Drive>Go to Properties> Click on the 'Tools' tab and schedule a disk check the next time your computer starts.

Disable automatic restarting so we can see if you are getting a BSOD on the restarts. To do this:
Start -> Control Panel -> System -> Advanced -> Settings (under Startup and Recovery) -> Uncheck Automatically restart

If you get the blue screen, take note of the errors and put them in your next post.

If you can, find the name of the update i.e. KB......., and if you can go to the Microsoft Help & Support site and search for the update in their database.

If you like you can post me the update reference and I'll have a look for you.

I think this is what is causing your system to re-boot:

The following boot-start or system-start driver(s) failed to load:
ATMhelpr
Fips
intelppm
kl1
klif

It looks like a driver problem.

Go to Start>Run and type regedt32 to open up the registry editor, and search for this entry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Intelppm
take note of all the entries and put them in your next post for me.

Regards

Martin