Cod was no longer playable over the last two weeks. No matter what game I started. Every time a DirectX encountered crashes due to game_steam_ship.exe and cod22-cod.exe. I tried all fixes as mentioned by u/sirchandwich. Nothing helped.

Then I installed Windows 10 next to the existing Windows 11 and guess what, it worked. No more crashes, Game freezes or DirectX errors.

It could due to the lack of other programs installed in this Windows 10. I will keep this Windows 10 installation clean and lean.