In order to troubleshoot your problem further we need to know more detailed specs of your system hardware.
1. Go to Start > Run, and type msinfo32
2. Go to Control Panel > Device Manager and look for any entry that has a yellow flag beside it
3. Download
|MG| SIW (System Info) 2008.4.2.0
4. Download
|MG| SIV (System Information Viewer) 3.36
5 Please fill out your computers specs in the User Control Panel here on the site as well. It will then appear next to your name. look at my posting and you'll see the drop-down arrow.
The make and model of your motherboard would be of graet help.
For you GeForce card , tyhe Nvidia 64-bit frivers are located here:
Drivers - Download NVIDIA Drivers