Try the drivercleaner (found on this site). And then try to install drivers. I had same problems as you but got it working eventually. I have an igp320m graphic card and I think you have to install something called GART drivers (I don't know exactly) - if you have igp320m. I think these drivers link your motherboard with your graphics accelerator so that windows can find them. Then install video drivers...Im not sure about this

but that's how I understand it and it worked for me...If this does not work, you should contact your notebook manufacturer and ask them. Good luck!!