ADOBE PHOTOSHOP CS2 + Vista.?

If you've restarted everything, logged out, and all those other quick fix things that are bothersome, but sometimes work, try to go through the computer and set up another account so you have two. (It's making the computer think you're on a shared computer if you have two accounts, or you can even go through and turn on the 'guest' account feature) Then, make sure you're logged out of both of them, turn off your computer, restart it, then log into you admin account and attempt to install photoshop again. I have the same program on my (vista) computer, so it SHOULD work.