Well there can be many reasons due to which Your Computer System gets hangs during use sometimes. The problem maybe big and existing in any of your Computer hardware or problem can also be smaller like Virus in your Computer.
So first Install Window again in your Computer and if the problems still exists than look for Hardware problems. any Hardware like Ram, Hard Disk or mother board can also cause the problem.
So first Install Window again in your Computer and if the problems still exists than look for Hardware problems. any Hardware like Ram, Hard Disk or mother board can also cause the problem.