If you are having trouble with shaky text in menus etc,and all round low performance with one of these cards (following upgrade or purchase of an old card, etc...). I recommend the drivers available at http://www.cifelli.com/cinemaster.htm, an OEM retailer. I would also recommend obtaining the region free utility available at http://www.rtg.se/~niclas/DVD/cinemaster/hardware.htm, which 'corrects' the .dll check for DVD region. A word of caution the cifelli drivers although giving superior playback, they disable output to the soundcard (sound is still played directly from decoder).