A Mac.

I dumped all that stuff on my pc. It was getting so annoying I found just taking the occasional bit of spyware less irritating.

It's like Norton, it's so bloody annoying, slowing and intrusive that it's worse than 95% of the viruses/spyware you could ever get. AND you pay for it.

It prevented viruses (factory settings) on my girlfriend's laptop by simply not allowing any net access or program alterations. It's like burning down your own city to prevent it falling into the hands of the enemy (during a civil war).