[RadPig94]

This is very strange, first all goes well, later don't load the game in the QMB.
I don't know if it is corrupted files, or a problem between W7 and IL-2.
Here you have information on how to install IL-2 in W7:
IL2 1946 and Windows 7 doesn't want to start

how come I'm always fortunate when it comes to OS problems? recently I read that a certain game wouldn't work at all on W7 yet i'm playing it at max framerate and only a couple of bugs.

have you tried cleaning registry?