Press PrtScn to copy the full screen to the clipboard
Press Alt + PrtScn to copy the active window to the clipboard
Press Windows + PrtScn to save a full-screen screenshot to Pictures > Screenshots
Press Windows + Shift + S to open Snipping Tool and select part of the screen
Open Snipping Tool from the Start menu for more screenshot options
On some Dell laptops, press Fn + PrtScn if PrtScn is combined with another key
Paste clipboard screenshots into Paint, Word, or another app with Ctrl + V