Game won't launch. "Unsupported operating system"

[Decay]

"your operating system windows 8 is not supported"
I'm on windows 10 on a higher end PC, I made sure I updated my graphics driver is up to date as well as windows updates, verified game files, etc. Idk how else to get the game to run. I've never had this issue with the game before and am not having issues with other games, like Star Field for example.

[Pure & Rustic]

Basics;
Make sure you have +35 GB free space on sysdisc C: (for temporay files, shaders loading)

If the game is on another disc, you need 10% more free space then the game size with the updates included. Remember all updates are downloaded to sysdisc first.

Update bios and other drivers on MB.
You should have program for this from MB manufactor.

You run windows and steam as and Admin???

Close game. Clear download catche in steam settings. Steam restarts.

Disable any overclocking. disable XMP and set it to a fix speed as med+ for the sticks.


Optional for network (game closed):

No antivirus/firewall blocking subservices.
See that IPv6 is enebled in PC and router and operativ.


Optional For performance (game closed):

Then browse to this in; Documents/call of duty/players - open this file in notepad;
options.3.cod22.cst -

Set the X between 4-9. SAVE file after every changes and close it.

// Thread count for handling the job queue
RendererWorkerCount:0.0 = "X" // -1 to 16

// Enables the async compute for specific cases
AsyncCompute:0.0 = "false"
Test both false and true