New
#11
Created recovery drive after last post, booted from it (but didn't do anything with it) first thing this morning.
Boot up afterward was slow, but it turned out there was an update pending, unrelated to the issue.
One restart later + an extra system restore point just on GP.
Making an extra recovery drive in progress, because I'm big on multiple redundancy.
Problem solved using Win 10 alone.
Thank you.