[quote=Sarkie]what motherboard have you got?
Try uninstalling ALL Nvidia drivers, including Nforce,
then install Nvidia Driver 91.31 and test
then install Nforce4 (Make sure you have right type) and test.
I got Gigabyte GA-K8NMF-9
I have already tried uninstalling ALL Nvidia drivers for 3 times.
Without all Nvidia stuffs, videos play OK but Sin:E doesn't work, showing a warning message that the shaders can not be found.
But last time I installed Nforce4 first then GeFroce.
I'll try 91.31 first and see tonight.