I downloaded a bad copy of this driver from the sis site and had big problems with my pc (it may have been because of somthing else I did earlier, who knows) ending in my second reformat in the same week. I found this on another driver site. It works perfectly. This is the video adapter for Packard Bell Legend Supreme 1970, I have no idea what other PCs use it. There is a text file in it with instructions on how to install it.