TADA!!! here's what you gonna do..
Boot your PC using windows 7 or win10.
Select repair computer using cmd
Look for your drive c: (type c: press ENTER)
Go to c:/windows/system32 (type cd windows/system32 press ENTER)
then type copy sethc.exe sethc.exe.bk press ENTER
last type copy cmd.exe sethc.exe press ENTER
restart your PC and wait for the log on screen.
Upon seeing the log on screen. press shift key 5 times or more until command prompt appears
Then type net user USERNAME-OF-PC * (it will prompt you to enter password)
Just press enter then another enter.
Then exit and press enter.
There you have it just click the account on your log in screen..
Hope this will help you bro.. Best regards..