I've been without the net for about a week, and was agitated to notice that many of my games would not launch immediately, at first i thought it was my display
drivers but more digging and watching the activity of Rundll upon a game launch, (and the fact that games not registered in the game exporer worked fine).
More info @
Windows 7 Game Explorer interfering with Game launching on systems lacking internet connections.
VV's and Testing appreciated, though im sure my 3 individual systems with individual configurations and setups are more then enough imo.