Pfkninenines wrote:
To go back to a 32-bit OS, you'll have to reinstall entirely. If you've got a DVD, it probably came with all of the versions on it, so you can reinstall with the same product key that activated your x64 install as long as you use the same version (Business, Home Premium, etc). You can use anyone's DVD of course, as long as you can access the correct version of the OS.
Alright, what about doing a dual boot? Would it be possible to dual boot a 32 bit and 64 bit OS? Also, If I make a backup of an XP system, could I use that to install it as a dual boot?
Also, my computer didn't come with any DVD's. I called HP and asked if they could send me the DVD's and they said that would void my warrenty.

edit: So could I borrow a friends Vista installation DVD's and activate them?