As Crashman says, the emission of interference is more relevant. (<A HREF="http://www.physics.gla.ac.uk/~kskeldon/PubSci/exhibits/E3/" target="_new">http://www.physics.gla.ac.uk/
~kskeldon/PubSci/exhibits/E3/</A>)PC cases have never been terribly good as Faraday cages, laptops especially. So don't worry about internal components being effected.
Incidentally Crashman, your sig is grammatically nonsensical.