You only need the certificate for 64 bit drivers. Your older XP drivers "should" work under Win 7. That's not a 100% guarantee, but generally existing drivers do work on newer OS versions, Otherwise if you are not plug and play for a PCI board it will not work for Win7. It was extremely risky on XP, where depending on the system and the board a non-PNP driver may or may not work. Don't even friends trying this with Win7 or 64-bit, just throw out the driver and start over again.