I found my fix (for now).
Oh my Lord, the effort to just log into a M$ site. Click click click. Wow.
I wanted to post here because I been having this same issue all night (W11 Pro, Dell hardware) and I could not figure out what caused it all of the sudden. My WIN key would not work unless I click it twice. Made a mess of things when I thought I was bringing up the Start with a press, or doing a WIN-R, and then realizing that was not happening. Fun too, I found CTRL would constantly make my mouse zoom!
I checked all the usual stuff and everything seemed in order.
Then I read something that made me just click here.
And I clicked Accessibility.
But wait, why? It is already disabled in Settings. Both classic and the over bloated Settings v2.
So, a third setting? It seems this has no bearing on the other settings on the other images posted. Nor vise versa. Seems a separate one. I turned that off, and my keyboard working normally again!!!
So, I had THREE places to make sure it is off. I tested and retested various combos, and none have any affect on one another where one is on, they all are. No, I had to make sure all three are off.
Maybe this can help someone else.