Press PrtScn to copy the entire screen to the clipboard
Press Alt + PrtScn to copy the active window to the clipboard
Press Windows + PrtScn to save the entire screen as a file in Pictures > Screenshots
Press Windows + Shift + S to open Snipping Tool and select an area to capture
Open Snipping Tool or Snip & Sketch and choose a capture mode
Press Fn + PrtScn on some laptops if PrtScn requires the Fn key
Paste the copied screenshot into Paint, Word, or another app with Ctrl + V