By default Numlock is disabled during Windows startup and users sign in.
Sometime it creates error when user try to use numeric part of keyboard to enter a password, without switching it on.
- open regedit
- go to Computer\HKEY_USERS\.DEFAULT\Control Panel\Keyboard
- In String Value “InitialKeyboardIndicators” change value to 2 to enable Numloc on during startup, 0 to disable