use winxp , this card operate flawlessly . I have be use Boxee to sort and play video on my old FIC SAMBA 1845GV computer . in winxp , hd video processing can be offload to the GeForce use a codec pack and compatible player . I be now use the latest beta driver from Nvidia , and planning on try win7 that allow dxva -lrb- built-in video hardware acceleration -rrb- . I would recommend this card to anyone that do no have a pcie or agp slot and want to view hd video .