There is no setting in Windows to get your PC to boot to the Login screen, the method to do that requires you to edit the registry.
Please follow these steps carefully.
Click your Start Button, type regedit and press Enter to open the Registry Editor
Paste this into the Address Bar at the top of the registry editor and press Enter.
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows
Right click the Windows Key (folder) in the left pane and choose New - Key
Name the key Personalization
Click the new Personalization key
In the right hand pane, right click and choose New - DWORD 32bit
Name it NoLockScreen
Double click NoLockScreen and set its value to 1
Close the Registry Editor and restart (not shut down) Windows for the change to take effect.