there's nothing wrong at all with whatever he said
okay first of all try kaspersky, its detection/removal is better than all others - if it doesnt work then read on..
firstly what's the name of the virus? (you probably dont kno but you said mcafee detected it so maybe you do know)
two, how do you know it's a virus, as in what are the apparent signs, other than crappy performance and slow internet
three, (do this especially if you dont know the name) open your task manager, go to the 'processes' tab, make sure all of it is viewable, take a screenshot and post
