My old Nvidia 7900 is strange again.?

Computer Specifications: Dell XPS 410 with Windows Vista Dual 2.4 GHz 256 MB Nvidia 7900 2 GB RAM Recently, I tried the demo of Quantum of Solace on this computer. There were tons of graphical errors and The Game was buggy, so I got rid of him. Later launched Halo 2 (which usually runs flawlessly), and ran into some graphical glitches that usually does not occur. Then I started Spore, and everything went downhill. Typically Spore works perfectly on my computer. When started one of the first times he fell. When I finally got it to work, the graphical errors everywhere. Numbers random and strange textures kept coming, The Game kept freezing, and then fell again. I tried to restart, but that does not fix the problem. I'm getting a new graphics card in a month or so, but I would like to know how to fix this problem today. Thanks Any ideas?.

I would like to download a new driver Nvidia and update the Direct X 9 for recent Direct X 9c. But that's about all you can do. Have a nice day Ken

Dell Laptop Common Problems – Freezing, Start Up Error, Blue Screen