I have a client who's experiencing small coloured squares (rectangles) on her screen.
The machine starts and runs fine. The squares are intermitent on games (not video demanding - things like solataire, etc). There are no error messages and the only time they always show up is when a video (stored on the HDD and made with one of her cameras is played - ie a little more demand from the video card). She is running W7 with lots of ram and the video card is a GForce 7300. I have checked and all the external cables are secure.
I don't want to order and install another video card if there is another possible explanation.