Thanks. I can wait. I have many games...
I also had trouble with my main drive not reading Sacred occasionally, and it won't read or install Diablo 2 either. My second drive (which is actually a writer and therefore not really supposed to be used for games) can install Diablo2, but it, too, won't install Beyond Divinity, very consistently. On the other hand, no trouble with installing KOTOR, NWN HOA, GOTHIC 2, etc.
So I am left wondering what is going on. Possibly I need a new drive, and this would be a good excuse to spend more money on my computer for some upgrading. I'll play around with my other games to see if the problem seems to be more drive-related than game related. On the other hand I only have ten days to return the game.