Single player --> Select start/resume campaign. Within 1hr the game will freeze and user needs to ALT+TAB. Sound also goes away. Once ALT+TAB, "Arma3 has stopped responding" message from windows and need to close game. Event Viewer then will have a application error with the arma3.exe crash recorded.

Has happened so far in all stages of single player campaign, as well as in multiplayer. But most consistently will happen in single player campaign.

No set recipe for reproducing it; Just load up the game and play it...

Game, OS and steam are all installed in C: drive.

Rig:
Asus P8Z68 V LX
EVGA GTX970 ACX 2.0 FTW with latest NVIDIA drivers (344.75)
Samsung SSD 840 EVO 500MB (patched with Samsung fix) OS HDD
Corsair Vengeance 12GB RAM 1600MHZ (2 x 4GB, 2 x 2GB)
Corsair 750W power supply
Windows fully up to date with Windows Update
Windows 7 64-bit genuine

Important Note: No other games do I have this problem. Not a single one. Including Arma2, DayZ... This is extremely frustrating.

I have already tried the following:

1. Clean re-install of Arma3
2. Verify game file integrity in Steam
3. Clean install without mods and with mods
4. Setting arma3.exe to "Run as Administrator"
5. Changing windows theme to basic (No Aero theme)
6. Changing number of sound sources in-game from 96 to 48
7. Setting arma3.exe as "run in compatibility mode: Windows XP SP 3"
8. Re-installing DirectX 11
9. FORMAT AND RE-INSTALL OS ON MY PC

10.Tried with no launch parameters, with some launch parameters, no difference

I am including all my Windows event Viewer errors for today, which will show the module in the event viewer as changing, from "unknown" to "arma3.exe" to "ntdll.dll"

One observation I will include: The game config files are in a separate HD, D:, where "My Documents" is located. Not sure if this affects anything.

Thank you for the help. This is a really frustrating issue with no obvious cause that I can think of.

Link to all relevant files required:
https://dl.dropboxusercontent.com/u/38556157/Arma3_Crash_Report.zip