MalwareBytes
This has become my favorite program for removing spyware. Download the free version and use it weekly to keep you computer running at peak efficiency. Be sure to do an update after the install and every time you run it. Remove all that it finds. You will save money using this great free software, because I will not have to come out and run it for you.

Download Page: www.malwarebytes.com

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Microsoft Security Essentials/Windows Defender
This is Microsoft's FREE anti-virus software.

Download Page: www.microsoft.com/security_essentials/

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NOD32 Anti Virus by ESET
This anti virus program is highly recommended by gamers. Although it is NOT FREE, it has low overhead and does an excellent job of protecting your system. Download the 30 day trial version, and test it out. If you like it keep it and use it weekly.

Company Page: www.eset.com