Hi, I was having a problem and was wondering if anybody could help me remedy this. I installed a new geforce 8400 gs video card on my dell dimension 5150 desktop with on-board graphics and after I switched to the new card, squares began to appear in the middle of my screen within minutes after restarting Windows XP. The boxes would flicker when watching a video or moving the mouse, and inside the squares were what appeared to be parts of a window that was open previously. When I scrolled up or down a Firefox browser, more squares would appear vertically.
The problem would go away after I reverted back to the on-board graphics.
Thinking my card was defective, I had it replaced with the same one and now I am having the same issue. Do you think it's the motherboard? I've inckuded some screenshots to show you what I'm dealing with. Any advice would be great, thanks.