Screenshot is an image taken by the computer user to record the visible items displayed on the monitor
Screenshots can be used to demonstrate a program, a particular problem a user might be having, or generally when display output needs to be shown to others or archived.
Here is how to take screenshot on Windows 7
Look for this group of keys at the upper right of your keyboard.
Windows captures the entire screen and copies it to the clipboard.
Windows pastes the screenshot (that is in the clipboard) into a document or image you are currently editing.
Go to programs > accessories >paint
Then paste and save.