I got a "Asus GTX 260" graphic card. The motherboards name is "XFX nForce 780i". 4GB of memory and the processor is an "Intel core 2 quad q9550 2.8 ghz 12mb". Everything is correctly installed, with a "Windows Vista 64-bit home premium".
Now the problem. When I have installed the correct graphicdrivers from www.nvidia.com it works just fine. I can also "RESTART" my computer and it's still fine. BUT when I'll turn it off, and later on wane turn it on again, windows installs standard VGA drivers and removes the nvidia.