[2023] EUIV random freezes

Right click on eu4.exe , properties, compatibility. Tick "disable fullScreen optimisations" untick every other box in that dialog, Apply and exit.

Edit settings.txt to say:

refreshRate=60
fullScreen=yes
borderless=no

vsync=no

Then in the launcher Game Settings menu, select fullScreen display mode.


IF that doesn't help:
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.

Please attach here your Documents/Paradox Interactive/Europa Universalis IV/settings.txt and pdx_settings.txt .
From your Documents/Paradox Interactive/Europa Universalis IV/logs/ folder, attach here system.log , error.log  

You might try a clean reinstall of nVidia.

Uninstall with https://developer.nvidia.com/cleanup-tool
Reboot
Install August 2023 https://www.nvidia.com/Download/index.aspx?lang=en-us
Reboot again

Good luck!  

Make a new Windows user on this machine and log into it with that. Go into the startup settings and disable everything you can, and reboot. Log in as that new user again - does it work better now?