If the old hardware like the router, printer, wireless adapter, sound card, scanner has Vista drivers they will likely work with with Windows 7. If only XP drivers are available, the hardware periphals will have to be replaced with new units that have Vista/Win 7 drivers available. I have M$ office 2000 fully updated and installed on a Windows 7 64 system which includes an AMD 64 4000+, Mach Speed NF 4 socket 939 MB, 2.5GB DDR PC3200., EVGA 7900GT, etc. I did not have to load a single system/MB driver, Windows 7 64 had all the drivers supplied to start right up without a single problem.