Relative to Paddysmom's comment on Office 7: I don't know where MS left their brains wihen they changed the way themenu work in Office 7. Obviously the huge user base was not a consideration.
I now have Windows 7 installed on three computers at home. It is, in my opinion, probably the best OS MS has released in 20 years. Vista was a mistake, and the real reason that Windows was released so soon afterward.
AbbeyandMolly, I do not know what you were trying to run Windows 7 on. It loads in half the time or less than XP or Vista. Those are measured times on my machines.
Regarding drivers for older hardware. The manufacturers of the hardware have been working on updating their drivers. HP, with thousands of legacy printers out there, is almost complete in updated all of the drivers for their legacy machines. Only very old ones are left without drivers.
There are issues with some software. Some software will not run on the 64 but operating system. Some vendors are offerring free patches, others are requiring upgrade purchases.
Back to Win7, I believe that MS has a good one here. They and included a lot of neat tools for those interested in using them. The system is stable, and quick. Youdo want to have a machine with as much RAM memory as it will accept and you can afford.