every video? or dvd's? Have you installed the dvd decoder that is on the video cards cd? And have you installed the latest drivers from Nvidia? uninstall all nvidia and video card programs from add/remove programs. Then use a free driver cleaner to completly clean the old drivers out. Then install the Latest Drivers from Nvidia and try that. If you are trying to watch steamed video with dialup then it is going to look like crap.