Er, the internal systems of computers run on DC, and DC power does NOT generate a harmful EM field to electronics because there is no induction.

I mean, you have fan's on your CPU's right?

Oh, also, the HDD is Shielded, theres a Wooping Magnet on the inside tho, used the shift the head but using a Coil of wire which a current is passed through, when inside a magnetic field, you get the Motor effect.