SpyHunter

Developed by Enigma Software, SpyHunter is yet another hard disk and Registry scanner. It’s free to download and easy to use, but you’ll need to cough up some cash to experience some of its more advanced features.

Sadly, with SpyHunter the free features do not include the actual removal of the spies – the scanner will reveal any nasties but won’t do anything about them until you purchase the full version.