Be very wary of spykillers. Many on the market don't do their job properly & some even have spyware themselves. A spyware forum showed that there's only a couple of such programs that do a proper job of correct detection & removal. LW does not have spy or adware. Using a poorly designed program like that could do your computer system a lot of damage.

We'd recommend these:

ad-ware http://www.lavasoftusa.com/software/adaware/ (FREE)

Spybot - Search & Destroy http://www.safer-networking.org/en/mirrors/index.html (FREE)

Peerguardian: http://peerguardian.methlabs.org/pg2.html (FREE)