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 Paint or another app and press Ctrl + V to paste the screenshot
On some laptops, press Fn + PrtScn if PrtScn is shared with another key