|Just wondering.....what update you installed....|
Hp computers had a problem with sp3 if they had a AMD cpu
sp3 caused multible problems.
There was a program to check and see if it was compatible and if not there was a fix.
The update was fixed, but there is still an old sp3 running around the net. People who can't get sp3 from Microsoft use it.
The above doesn't fix your current situation but if it started with sp3 you may want to consider it before re installing it when you get up and running again.