Compare Spyware Removal

Have Just Downloaded A Free Version Of Spyware Doctor, I Ran A Scan And Found Some Spyware Called Downloader.PopCap.
The Problem Is That I Am Unable To Remove It Without Buying The Full Version Of Spyware Doctor.

What I Wanted To Know Is If I Can Remove It Myself Without Buying The Full Version Or Is There Any Other Good Spyware Removal Programs That Will Do This For Free?