MSI 9800GTX + issue

I updated my driver, about 2 days ago to the latest. Tonight I installed an IE7 hotfix for windows, restarted and about 10 seconds after the restart(at the desktop while background apps are loading) I got a gray screen and some sound artifacts. system restored before applying the hotfix, same results. Safe mode its fine, un installed my V-card drivers, restarted. and system is running fine with no drivers. I am noticing no graphical glitches or anything right now (typing from the very PC) Currently re installing my drivers in the hope something got corrupted there. So I am assuming 1 of 2 things, PSU or video card. Unfortunately dont have a PS to test with, So if its still fubar after this re install of the driver, I will probably pick up a new PSU (since its the cheapest option to start with) I could probably use a better one anyhow. Just curious if anyone has had a similar experience and knows which is the root cause. Will update after driver install.

EDIT:

After driver re - install everything "appears" to have returned to normal. Although my system is acting wierd upon restarts. After I installed the driver and chose to restart, when my computer was rebooting, it just hung there I had to power it off and power it back on to get it going. Will game for awhile and see how it goes.