Bypassed the security and stuff.

It's not that hard to hack a PC and remove those. Do you have a anti-hack protecting every single hole in your in your PCs mostly likely factory stock security system? If not, you'd be hard pressed to keep out the average script kiddie, let alone someone who actually develops his own hacking tools (not just talking about myself, I'm talking about the hacker population in general). Face it, unless you have some god-like active counter hack system set up, you're screwed. Anyone with a brain could hack a PC. All you need is a modem, or the ability to plant a spyware file, neither are hard to do. Those aren't the only ways either.