Working on 32Bit, 64bit Arma 3 fails to launch from launcher. Initially to do problem occurred after playing in a KOTH server. I have no other system to reproduce this on.
Works with the 32Bit preset but is not ideal for game play.

All software is up to date for the hardware I am using.
No compatibility settings change anything.
Changing start up change the outcome apart from 32 platform.

Start up perams:
Platfom: 64-bit
Static background in menu:Enabled.
Skip logos on start up:Enabled
Force Window Mode: Enabled

CPU count: 4
Extra Threads: Enabled > File operations:Enabled | Texture loading:Enabled | Geometry loading:Enabled
Enable Hyper-Threading: Disabled.
Memory Allocator: Intel TBB 4 Allocator - 64-Bit (tbb4malloc_bi_x64) (Default)
Enable Large-Page Support:Enabled
System memory limit (64-bit):4096 (Enabled)
Video memory limit:3042 (Enabled)
No Logs:Enabled

My Build:
Mobo: ms-7519
CPU: I2 Q6600 2.4Ghz ~ 3.3Ghz OC
GPU:GTX 970 4GB
Ram: DDR2 8GB 864MHz