Dell XPS 18 (1820, Early 2014) - Manual (Page 13)

Setting Up Your Computer │ 13
Turning On Your Computer
CAUTION: Use your computer in an ambient temperature
between 0°C and 35°C (32°F and 95°F).
1 Press and release the Power and Sleep/Wake button .
NOTE: After the button is pressed, there is a slight delay before
your computer turns on or off.
2 Finish Windows setup by selecting your options for
personalization, signing into your Microsoft account or creating a
local account, and so on.
a. Enable security and updates.
b. Connect to your wireless network.