No need
ive a win10 64bit surface with a ARM CPU. I cant start CK2... is ARM not allowed?
CK2 since patch 3.3 is 64bit only, but earlier patch 3.2.1 should potentialy run in the x86 emulator which ThatDaniel above mentioned.
You can install the 3.2.1 version in Steam via settings for CK2 - Betas tab.
As far as i can see the 64bit emulation only comes with the Windows Insider program for now and in Win11, but also in an
update in Win10 sometime in the not too distant future.
This thread will likely get moved to tech support.
They might be able to provide more info.