Can I use old OS discs for new computer build?

Question

I have a (still wrapped) windows XP disc that came with my dell laptop (which hasn't worked for 2 years). can I install this on a new build? to add to the confusion, I also have the HP express upgrade to vista for another laptop that I own. I didn't do the upgrade, but still have the disc, would I be able to use this disc to upgrade the XP to vista? Windows just seems too expensive! I'm trying to find a way around spending $200+ just for an OS.

Answer 1

Yes you can install an old OS on a new computer. No you cannot use a Vista upgrade for XP.