Step 1 :
Press ALT and Print Screen (you must hold down Alt when you press Print Screen) to take a screenshot of the active window. Press just PrtScr (or Print Screen) for the entire screen. Alternatively, use the Snipping Tool: Start Menu/All Programs/Accessories. The remainder of the steps describe using the Snipping Tool.
Step 2 :
Choose the kind of screenshot (snip) you would like to take. Rectangular is already chosen by default. You can take a screenshot of the entire screen, a window or just a selection of the screen, that you select.
Step 3 :
Click and drag around the area you want a screenshot of. If you chose a window snip, you may be asked to click on the window you’d like a screenshot. If you chose a full screen snip, go right to the next step.
Step 4 :
In the window that pops up showing your screenshot, press the disk icon to save it. Now you can send this screenshot to someone as an attachment to an e-mail, if you want. The image is also copied to the Windows clipboard for use in other applications.