Okay,
I have recreated the problem on my own system by turning DEP settings to "Turn on DEP for all programs and services except those I select:"

When I run my game, it says "an unhandled win32 exception has occurred in xxx.exe [6708]"

I will try to make a very small game to see if and when this problem takes place.

If you can think of any possible cause for this, please let me know.

I would love to get this fixed, as it seems to prevent a small minority of people from enjoying my games.

I should mention I am using A7 Commercial - if that is a factor let me know.
I am using all Lite-c scripts.