Boot Windows live usb > repair my pc > cmd/command prompt
cd Windows/System32

ren utilman.exe utilman.exe.bak

ren cmd.exe utilman.exe

reboot > ease access button left bottom

net user Administrator /active:yes

file explorer > right click this pc > users and groups > right click user > set password

All back:
ren utilman.exe cmd.exe
ren utilman.exe.bak utilman.exe

User add:
net user Lassi *

Change passwd
net user Lassi salasana123 /add