Yes i agree.
Although isnt there a fair bit of earth leakage from the PSU??
Not really up on computers so be nice.
I won't say there isn't but I will say there should not be for two reasons. Fisrt, back in my collage days (many years ago) I designed a couple of temperature stabilisation circuits that used the same techinques as modern power supplies and those had no earth leakage, Second most (but I admit not all) lap tops have no earth! But who knows what cost cutting exercises bring with them.