These two are free and get most if not all the junk:
Malwarebytes Anti-Malware:
http://www.malwarebytes.org/products/malwarebytes_free/
HitmanPro:
http://www.surfright.nl/en/hitmanpro/
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If you do not have a virus scanner, this is great. BUT do not use if your running a virus scanner as they tend to crash your pc if you run more than one scanner.:
Avast:
http://www.avast.com/index