What is the best, free, Spyware deletion program?

[StrainedEyes]

Early today I somehow managed to get infected with spyware, and Ad-Aware, my trusty sidekick, doesn't seem strong enough to defeat it.

Does anyone know of a good, free, program?

[black_dust]

http://www.superherohype.com/forums/showthread.php?t=140469

Malices guide to free powerful software!

[War Lord]

Hijack This is a great program at picking up everything, but you better know what you're doing.

[BAH HUMBBUG!]

spybot is pretty good at picking up stuff that ad-aware won't. Also try microsoft spyware cleaner, it's free on msn