The Basic and Straight Explanation for the Problem for the Window 7, XP or 8 Shut down after loading is due to RAM problem.This happen when RAM is defective.This can be acknowledge by basic understanding the process.

For Eg. 1.When you switch on your P.C window or any other operating system get properly loaded and certainly it get shut down when any other application is click to start other than window application which you get with Operating System. 2.Other than Window Shutting down it also show the Blue Screen Error which is the another means of RAM Defective.For your understanding you can see the Blue Screen Image below 2.You can also replace the RAM with your friend and check the process.

EXPLANATION WHY YOU SHOULD BELIEVE THAT RAM IS DEFECTIVE

•  HARD DISK – Window O/S install in Hard Disk which is basically install in C: drive. So if Hard Disk have problem than your window will not load and at certain time your Window install in hard disk will be get BREAK (Destroy) and you have to again install the O/S.This will not happen at first time when window is install . It get BREAK at second start.So this is Hard Disk problem not RAM.

• MOTHER BOARD – Many time window Shut down by MOTHER BOARD fault but this can be distinguish by a certain timing of shut down which will happen not instantly only after 5 or 10 min. this can be check by running only running only one Application for 5 to 10 min. but in RAM instantly Computer Shut down as soon as any Application is run .It will not take  5 to 10 Min.
• PROCESSOR – P.C will not get start if processor will have problem.