No computer repairer can trick you after reading this.

Some people that fixes computer might trick you and change some of your hardware, So...

In order to know if a computer repairer changed a piece of your computer's hardware you will have to do these few steps.

every piece in your computer has a unique serial number no other piece in the world has.

• How to know the serial numbers of your hardware pieces?.

checking for these numbers can be easy as installing a program called  "Belark" that analyses your hardware and gives a report that contains a lot of information including every piece's serial number.

• Make use of the serial number.

in order to check if a piece is changed, install the program and save the report before you computer crashes so you can compaire the serial numbers everytime you give your computer to get fixed.