Hi, The windows repair did not do anything with regard to log in.
When you power on just tap f8 to go to Safe Mode.
Then select the command prompt in the menu.
In the command prompt type rstrui.exe
You get the System restore
There you select the restore point, by clicking more restore points tab.
Select a System restore point to a day, before the creation of all repairs restore point or when there was no problem. Allow system restore