Earthing My Personal Computer

Your friend is wrong. The earth ground supplied by the power connection is sufficient.

Unless, as many people do, you built your own and failed to pay attention to the detail of making sure your mother board has a good ground connection to the power supply (which is where the ground connection is made to the cord) and/or the chasis. This happens a lot and may explain why your friend had to worry about it. But if you bought a computer that was already factory assembled, this would have been done and tested prior to shipment.

Thanks for your kind explanation.

If the equipment is marked with a 'double insulated' symbol (a square within a square), then it is unneccessary to earth it, and to do so might invalidate the manufacturer's warranty if still running.

The purpose of the earth conductor is to operate the circuit protective device(s) in the event of a fault.

No additional earth ground should be necessary.

Are you having trouble with static discharge?

There are specific methods used to prevent and/or safely dissipate static buildup so that it does not occur. If this is your problem, do some Google research on anti-static products and procedures.

Before adding my own static discharge prevention, I could easily "reboot" my computer with small discharges from fingers to keyboard or mouse. This can cause permanent damage to PC components so prevention is important.