Earthing (grounding) A Computer In Thailand.

You could also consider an 1:1 isolation transformer to supply the computer.

Switched mode power supplies do have leakage currents to earth up to 3.5ma for IT equipment. All class1 metal clad equipment must be earthed in an approved manner.In the meantime make sure the circuit is protected by an RCD.

This problem ( lack of earthing ) will always be with us for many years to come.