No system restore point is available :( Stupid Thing.
SSD check = O.K - > No failures!
Think the only thing is to reinstall
McKnife
Ok, I administer windows like forever. Never have I seen a system where creating users was impossible, nor have I read from it and I read a lot, every day. It's hard to say what is wrong, but instead of reinstalling, do an inplace upgrade to repair things.