Dell XPS 18 (1810, Early 2013) - Manual (Page 17)

5 Complete initial setup of Windows.
Your computer is ready for use when the Windows Start screen is
displayed.
NOTE: A lock screen may be displayed when your computer wakes up
from a sleep state.
NOTE: If the login screen is not enabled, the Start screen appears after
you swipe-up on the lock screen.
Setting Up Your Computer │ 17