over 2 years ago - AndrewT - Direct link
Are you sure you left no files or folders left under either the Steam CK3 or Documents CK3 locations, before installing again? Because that error log looks a bit worrying in that respect!

DXDIAG is a program you run from the Windows search box on the task bar. After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.  
over 2 years ago - AndrewT - Direct link
The only issue I see in there is an outdated nVidia driver, so let's get that updated:

- uninstall it and all other nVidia software
- reboot
- install Feb 2022 https://www.nvidia.com/Download/index.aspx?lang=en-us
- reboot again

Then delete the Documents CK3 folder again, after moving any valued save files elsewhere first. test with a new campaign - is that any better?  
over 2 years ago - AndrewT - Direct link
Everything with the word nVidia in it please!  
over 2 years ago - AndrewT - Direct link
Even more serious issues showing up in that error log with the nVidia driver or card. Can I get a new dxdiag.txt too please, and Documents/Paradox Interactive/CK3/pdx_settings.txt ?  
over 2 years ago - AndrewT - Direct link
Now we have a crash in NVDisplay.Container.exe ... really not sure what to make of this!

Edit that pdx_settings.txt in Notepad. Find the Renderer line and change it like this:
"renderer"={
version=0
value="OpenGL"
}
The game will be slower like that, but does it crash?  
over 2 years ago - AndrewT - Direct link
That eliminates DirectX as being your problem, but can I get a new dxdiag.txt please?

And install and run the free utility Speccy. Send its output to a text file and attach that here, thanks.  
over 2 years ago - AndrewT - Direct link
I see you use Avira, which is not known to be a problem with this game. But do make sure ck3.exe is in all its exemption lsts.

You have two Windows updates stuck "In Progress", are you aware of why that might be?

Please try unloading Nahimic while we work on this, I've seen it cause problems to our games.