Display Issue

I upgraded to Windows 7, and a day later I started having severe graphical issues. I sent it in to get fixed, they replaced the mobo and the video card, after installing windows 7 it worked for 1 day again but then started acting up again.

Both times I re-installed Vista after having the issues, and they're still persistent. Is it possible that windows 7 is actually breaking my computer? I use windows vista home, was upgrading with a clean install each time I did this to windows 7 professional.

To give a little more detail about the issue, I get double displays on one monitor. For example, imagine your monitor right now but imagine it duplicated with one image on the top and a 2nd image on the bottom. It's hard to explain, but that's the best I can do without pictures. To see photo's, look here:

http://img4.imageshack.us/i/dellloadscreen.jpg/
http://img690.imageshack.us/i/desktoprc.jpg/
http://img21.imageshack.us/i/diagnosticwindow.jpg/
http://img4.imageshack.us/i/screen [...] sappr.jpg/
http://img4.imageshack.us/i/windowserrorscreen.jpg/