[Fireskull]

I would suspect a hardware issue. I'm still on XP32, but it's my understanding that there are quite a few who have the game running on Win7 64, or am I mistaken?

Bulau, yes, this is correct. There are plenty of people with Win7 64-bit who say that they have had no freezes or anomalies with IL-2 after installing it.

I agree that the Win7 64-bit itself likely is not the cause of the problem, though a solution might involve a step or two in the process which directly involves Win7 somehow, such as BIOS related, for example.