Thanks for all the help, but I think I’ll leave it at that.
I did reinstall both the intel and nvidia cards, but that wasn’t it. I did a sfc check and the log says d3d10warp hash does not match the windows update one, with sfc not being able to fix it. But MS doesn’t not allow reinstalling dx12, since it’s merged into w10, so other than reinstalling w10, there’s no fix for me. And that doesn’t even guarantee it would fix the issue.
Since my issue is only about closing the about window (which I went to for the silly animations), I’ll wait it out and recheck in a couple of months.