I don't know, but the first thing I am suspecting is the driver. Do you know which GeForce driver version you're using?
If not, then perform the following steps:
1. Right-click the Desktop
2. Choose "NVIDIA Control Panel" (there are other ways to open it, but this is about the easiest)
3. Click "System Information" which is located at the bottom left-hand corner (all the way on the bottom in the lower-left corner)
4. The driver version is listed in the white area of the box that opens up. It is the first number at the top of the list in that white area.
If you do not have the NVIDIA Control Panel, it may indicate that you either have the generic Microsoft Windows driver, or just simply the GeForce driver that Microsoft releases through Windows Update. If this ends up being the case, then I can help you replace it with the one obtained directly from NVIDIA's website.
I'm not saying that this will turn out to be the solution, but it's just that this is one of the things I would check out if it were happening to me.
This message was edited 6 times. Last update was at Apr 02. 2012 10:17