one Owner and the Administrator users, when I log in them, after waiting it throws me in to a temporary user

well, after restart it is the same, I have one corrupt Owner and Administrator users and one working Owner user and in registry I have only that file with ending "1002" no files with "1001" and no...

OK! Thank you so much for the help. I'm in the midst of writing important papers for work and it would have been very bad if I could not have used my laptop to continue working on them!

well it stayed as I edited it. now instead of 1002.bak it is 1002
But there are no 1001 endings and there is no 1002.bak file as well

Well, I deleted the ".bak" part and after restart I had 3 users to log on to, administrator and two owner, I tried to log on to the second owner account and it logged on to the real deal. Now I'm...

Help! Yesterday my laptop may have overheated a bit and after that, when turning it on, I get only temporary users both at Owner user and Administrator. When I log in trough administrator and go to...