[2022] Low fps after 1.7 update

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, refresh rate 60.

Is that any better?

If not, does reverting to 1.6.x in the Steam Betas tab for this game get back to acceptable performance? Or still an issue now?  

Just to be clear, 1.6.1.2 is now slow whereas it was not before?

If that is the case, clearly the issue is local and outside the game as such! However I see nothing in particular in those files to point to what it might be.

If you make another user on this machine and log into it as that, does the problem still happen with both game versions?

Please install and run the free utility Speccy, send its output to a text file and attach that here, thanks.  

reviest said: Using test account helped and I was able to see the game working as intended. No changes on main account.

Then either something is running under the main account that isn't in the test account, which is getting in the way, OR there is a problem with the user profile of that main account (which would be a Windows problem I can't really help further with).

There's no file attached to your post.  

reviest said: Thank you for taking time to help me. I've found out that the problem is with with explorer.exe process which is loading cpu until I open task manager. The moment I open task manager the explorer.exe process reduces cpu usage from 30% to 0% and CK3 immediately starts working as expected.

Goodness me! No real idea why that would be, aside from my speculations from before

AndrewT said: either something is running under the main account that isn't in the test account, which is getting in the way, OR there is a problem with the user profile of that main account

You may need Windows support help to drill down on that further.

I'd love to know what caused that , if you choose to pursue it!