There shoulden't be any problems involving installing non-w7 games onto w7
If they won't install go and have a look at the game itself, since I have that error myself. I can't install SA anymore(disk is to damaged, but I still need to insert it before I can play
) so everytime I get a new PC or reboot it, I have to take SA with me
But since you tried that already I have no clue in solving that problem with VC