Grit

I recently installed Windows 7 on my Inspiron 1501 laptop. The video card is an Xpress 1150 and the whole unit is about 2 1/2 years old. Just after loading Windows 7, my computer began crashing. The screen would go a random color which I figured out later wasn't random at all. It actually pasted the prevalent color on the screen over the whole thing in a vague bar pattern like lines of miniature color gradient. It does it at random without any warning. I'm wondering if this is a compatibility issue. Maybe it's coincidence and my video card is going bad. Anyone else having a problem like this?