Computer is frequently hanged?

We sometimes extremely annoyed for this frequently hang problem. Now consider the problem in cool head before go to the engineer. My  computer hardware tips is below :

                                                       

hardware tips

Disconnect the power cable from the point. Open the casing.

If the cooling fan on top of the processor is stop for dust, clean the dust by a brush and fixed the fan strongly.

If the processor is hot the pc will be frequently hanged.

Next check the RAM. If the chip is defected, pc will frequently hang.

If you have two RAM then put on them changing the slot

It can find the RAM’s problem.

If the Graphics card is not compatible with the processor or mother board  

Pc can frequently hang.