Hello,
always i play arma 3 (normal, Altis-Life, KotH or Wasteland) Arma 3 crashs (Win7: Arma 3 not working).
I did try format c:, delete all .dll and run the Steam-Data-Fix-Manager, a new GPU - Ram and SSD and various Gamestartups (-jemalloc_bi for example).
System:
i5 3750k
Zotac Geforce 770 AMP-edition
Asus Board
Samsung EVO 512gb SSD
16GB DDR3 Ram