Oh, I figured I'd put a little plug in for my favourite Adware-buster.

Spybot: Search & Destroy is a great program for ferreting out those annoying adware and spyware programs that, in my mind, are worse than any computer virus.

So if you're finding that your computer is running really sluggy and needs a swift kick to do anything, try running Spybot or any other adware buster and that should help you out!