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Whether that's responsible for these crashes I'm not 100% sure!
Has it ever worked on this hardware? Or never yet?
Right click on ck3.exe , properties, compatibility. Tick "disable fullScreen optimisations" untick every other box in that dialog, Apply and exit.
Then in the launcher Game Settings menu, select fullScreen display mode, Vsync off, cap refresh rate at 60.
If those don't help, please seek a refund from where you bought the game.