Ground yourself!
Wear an ESD wrist strap or by touching the computer case
ESD stands for Electrostatic discharge and will fry circuits and other computer components. In order to prevent ESD or other electrical shocks, you should always ground yourself. One way to do this is to wear an ESD wrist strap. Another way is to touch the computer case before beginning to work.
ESD Strap
Always wear your ESD strap when working on a computer.
Touch the Case
If you do not have an ESD Strap