no users on login screen - solved
https://www.technibble.com/bypass-windows-logons-utilman/

1.
Use the Windows Vista or 7 DVD - Repair computer

2.
Reparing computer

3.
Rendszer-helyreallitasi beallitasok  --> Tovabb

4.
command promp

5.
C:\
cd windows\system32
ren utilman.exe utilman.exe.bak
copy cmd.exe utilman.exe

6.
restart
(shutdown -r -f -t 5)

7,
On login screen: press Windows+U 

8.
cd windows\system32
cmd

9.
sfc /scannow

10.
restart