I'm having the same problem, but I don't think its an Arma3 <> Windows 8 problem; I think it's a Stream <> Windows 8 problem. They should reconsider making this a stream only game once its release in full.

The rag doll is pretty spot on, but more gore ..I.E. realistic body damage would be great, plus I'd love to see a head or a chest cavity explode.

P.S. Remember you have ALOT of Iraq, Afghanistan and Gods know what other war Vets playing this game, so please make it as real as you can; And beside this game helps me manage my PTSD.

Has there been any new development on this issue?

Here are my computer details via the "DirectX Diagnostic tool" does this Help?

Name: Intel(R) HD Graphics 4000
Manufacturer: Advanced Micro Devices, Inc.
Chip Type: Intel(R) HD Graphics Family
DAC Type: Internal
Device Type: Full Display Device
Approx. Total Memory:5930 MB
Current Display Mode: 1600x 900 (32 bit) (60Hz)
Monitor: Generic PnP Monitor

The only files I see are arma3.bidmip, arma3.mdmp and arma3.rpt. which one do you need?