Computer hangs on desktop

Computer hanging is a worst problem.
In this a computer freezes
It is due to many reasons. Such as virus attack,low on memory and Dust On RAM

The main reason due to which a vomputer freezes is dirty RAM.
RAM cleaning is Very Important.

How To Clean a RAM

Step 1:Put Out Your RAM carefully. 

step 2:Get a Rubber to clean RAM. 

Step 3:Install RAM Back.