<i>"rugup"</i>

Now there's a good word! ;-)

I think you'd be better to solve the <b>problem</b>, rather than just prevent the <b>symptoms</b> (your ground trace burning)

It sounds like you have a major earthing (grounding) problem.
Are your printer & PC supplied by power outlets on different phases?
Could one of your outlets have reversed (Hot/Neutral) polarity, or other wiring faults?