agree with @NinjaZombie a lot of us take it for granted, simply because we don't have a real idea of the costs/ what amount would be needed to regularly maintain etc
Did spybot remove the news app it had found? It could well have been lurking within that, as I said, the problem I had was hiding in the Freecorder app and I'd used that without trouble for years to rip streaming media but a recent update contained something that stuck dodgy adds on many websites meaning I had to get rid.