In the last few weeks my spyware finders (spybot, ad-aware, and Earthlink's spyware blocker) keep finding the same spyware on my computer every day. I keep removing them, but the next day they're back.

Can someone point me to a place where I can learn about how spyware is getting onto my computer, so maybe I can catch it, or at least learn what I'm doing that's bringing it back so I can quit doing it.

TIA