Intel does not provide official Windows 7 64-bit drivers for the GMA 3100. The last driver release from Intel for this GPU was for Windows Vista 64-bit . Because Windows 7 shares core architecture with Windows Vista, you can often use the Vista driver as a workaround.
Click , browse to the extracted folder, go into the Graphics subfolder, and select the .inf file. intel gma 3100 driver windows 7 64-bit
Compatibility and support status