How to capture screenshot of desktop or start in Windows 8

Step 1 : Click on the Print Screen ( PrtScn ) button of the keyboard
Step 2 : Open any Image editor such as Paint
Step 3:  Click on Paste and your screenshot will be passed in paint
Step 4 : To save it click on  File ,then click on Save as and select your desired format of image and    the location where you want the image to be saved and click on save