Press PrtScn to copy the entire screen to the clipboard
Press Windows key + PrtScn to save the entire screen as a file
Press Alt + PrtScn to copy the active window to the clipboard
Press Windows key + Shift + S to open Snipping Tool and select part of the screen
Open Paint or another app and paste with Ctrl + V if using the clipboard
Save the screenshot file from the Screenshots folder in Pictures if using Windows key + PrtScn