I just bought a new HP computer with Windows 7 Premium and is like XP with a lot of good stuff added.
No troubles with accepting the printer or my camera, even without loading any CD software.
Sometimes the software that comes with printers and cameras is over kill when all you want is a simple print job or loading picture's you just took.
My Toshiba Laptop took a dump, so I got this new HP with bells, whistles and a whole lot of increased speed.
Vista was, in my opinion, too much too soon, just to rake in some money while they perfected 7.
My wife's new PC has Vista and she has no problems either, but setting it up took a little work, getting it to load her scanner, camera and printer.
If you have an old PC like mine, which was 6 years old, I recommend getting a new and faster machine. You'll LOVE the difference in speed and efficiency.
After all, It only money.

Have a good day.
1987 Craftsman Double Wide 42x28,w/attached 28x12 foot enclosed porch/ re-shingled 2 yrs ago. Original exterior vinyl w/no sheathing.