It's also only Arma. DayZ runs just fine.

Here is a crash report with me just trying vanilla Arma (no mods, only required DLC) just trying to start a solo campaign.

Yep, did all that. Still no joy.

In T122581#1557020, @Alwin wrote:

Hi,

Here is possible solution that could resolve your problem:

0x00000001 – UNABLE_TO_INIT_DXGI
The game is unable to initialize a graphical subsystem. Possible solutions:

• Update the graphics card drivers to a newer version.
• Rollback the graphics card drivers to an older version.
• Check the temperature of your GPUs and CPUs.
• Disable the Steam Overlay.
  
  Can I have some crash report from you, plz?

Is there a freaking fix for this? I have tried everything suggested so far.