Hehehe yep! Be sure to check that your fan is working, mine died and caused a load of problems.. splotchy random lines, and when I upgraded the drivers the screensavers froze, became slow and choppy until I reinstalled dx9 (of course at the time I didn't know it was my fan.) Anywho, I bought a new video card and all is perfect again.
BTW, I too have AVG (free edition) - no problems here.