APOS crashes to desktop, just like that

[Lemonade]

My installation is very fresh and contains all DLCs plus some basic MODs. Very frequently the game crashes to desktop during battles. It doesn't matter whether it's a deployment phase, the middle of the game or the statistics screen at the end of the battle. If APOS decides to crash, it just quits to desktop without any error. I'm looking at the game screen and the next second I'm looking at the desktop. Just like that.
This is what I have installed (list from update module):

Code:

1. Skins Mod Ostfront Kharkov 0.02
2. 1943 Wehrmacht paint 1.00
3. VAPOSM 1.50
4. Addon Krasnaya Polyana 1943 1.01
5. Addon Blau 1942 1.09
6. Addon Sokolovo 1943 1.05
7. District Update 1.03
8. Game Update 3.09

I always run APOS in a windowed mode in my monitor's maximum resolution. I frequently ALT+TAB to other windows.
Any ideas why I get these crashes?

[Flashburn]

Drop mods and try.  Then add one by one until you figure out which is causing the issue. 

[budd]

wasn't there something mentioned before about ALT + TAB leading to crashes. play a game without alt+tab see if it crashes.

[Lemonade]

I'm sorry, but playing APOS long battles without ALT+TABing is impossible for me. I always have something I'm doing concurrently. Be it Internet browsing, e-mail checking, document writing, etc. Besides, I'm running APOS in a windowed mode, not a fullscreen one. So ALT+TABing from and to it shouldn't really have impact on stability.
On my old rig I was ALT+TABing all the time and APOS didn't crash at all. And if it did (very, very rarely), it was with a specific error message.

@Flashburn, I'll try your suggestion. Thanks.