atgm

Trying to recover a stable clean installation of Vista Ultimate x64. It's been working for at least 2 months with no internet connection. Finally today hooked it up to the internet and did a windows update, out of the over 100 updates I only chose the driver updates (bad move!) after 1% stopped it to restart the PC, it asked me to do the installation and shutdown and i said yes. Once I started the PC, vista wont start up. I keep getting a blue screen once vista starts to load.

I tried the repair tools, nothing is working so far. Based on my analysis of the situation, all i got to figure out is how to undo the windows update installation and things should get back to normal (wishful thinking).

-startup repair - didnt work
-system restore - didnt work

Am sure it's an OS issue rather then a hardware issue.

Any hints?