Having weird graphics card related problems.

[Arjahn]

As many of you know by now due to my incessant posts in this section, my pc is prone to issues. Right now I am having a few weird ones that are most likely graphics card related. My PC has stopped BSODing, which is nice, but now Youtube videos are pixelated, the machine still takes damn near ten minutes to boot, and now I'm getting stuttering and a weird message that says "your graphics card does not support aero", even though I've been using it forever. I've updated and reinstalled the drivers, dusted the whole thing out and now I just don't know what's going on. Oh and now the text is lagging when I type this post. Awesome.

Please help me out if you have any ideas as to what might be causing these problems, thanks.