Just off the top of my head, is UAC enabled? (User account control) If it is, it can inhibit many functions. I might be off the mark, but it's where I'd start looking. If it's turned on, turn it off, reboot and then see what happens.
Doc, you were absolutely right! It seemed so simple that I actually didn't try it until now. I'd been corresponding back and forth between Stardock Technical Support and trying this and trying that, including running batch files and downloading patches and whatnot but finally I got around to trying your suggestion and it worked incredibly well! Thanks a bunch! 