[luther01]

this problem is not to do with vista 64bit, so rolling back to xp might not solve anything. i use vista 64bit and have no problems. there are other possibilities to research such as overheating, unstable overclocking, virus, how are you sure it is the drivers? is it the famous "nvdkklm has stopped working and has recovered" error message?if it indeed the drivers, you could do a clean uninstall of the drivers using driver sweeper and then install an older driver version. do you know how to do a clean driver install?