Press PrtScn to capture the entire screen
Press Alt + PrtScn to capture the active window
Press Windows + PrtScn to capture the entire screen and save it automatically
Press Windows + Shift + S to open Snipping Tool and select an area
Open Paint or another app and paste with Ctrl + V if you used PrtScn or Alt + PrtScn
Find saved screenshots in the Pictures > Screenshots folder if you used Windows + PrtScn