I am currently using Paradox 4.5 on a pc with Windows XP. When I attempt to run the program on my laptop that is running Vista, the window will not enlarge to full screen (I've selected that in the properties), it opens and remains in a small window; however, the program does work.

I just purchased a new desktop running Vista, and the program won't open at all. I was told that by upgrading to Windows 7, there would be the capability to revert to XP and thus use Paradox again.

Any comments or advice would be appreciated.