5 Works with Windows64bit and does the job perfectly.SiScott | 08/05/2010 | See all SiScott's reviews (98)Top 100 Games Reviewer Top 100 Mobile Reviewer I primarily bought this because my other Creative sound card (which wasn't that old) did not work with Windows64bit. Creative simply did not release a driver for it (not impressed).Bought this, and it remarkably smaller then I expected. Its TINY for compared to my other one.No complaints at all. Very easily slotted into its PCX1 slot, Windows7 easily found workable drivers and installing everything from the CD went perfectly. Currently updating it now and its working great.If you want a card which is certain to work with Windows7 64bit, you can't go wrong here and its a reasonable price too.