Malwarebytes Anti-Malware Free

Malwarebytes Anti-Malware Free utilizes Malwarebytes powerful technology to detect and remove all traces of malware including worms, trojans, rootkits, rogues, dialers, spyware and more.

http://www.malwarebytes.org/products/malwarebytes_free/
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AVG AntiVirus Free 2013

AVG Anti-Virus Free Edition is trusted antivirus and antispyware protection for Windows available to download for free. In addition, the new included LinkScanner® Active Surf-Shield checks web pages for threats at the only time that matters - when you're about to click that link.

AVG Anti-Virus Free has these following features:

    Award-winning antivirus and antispyware
    Real-time safe internet surfing and searching
    Quality proven by 80 million of users
    Easy to download, install and use
    Protection against viruses and spyware
    Compatible with Windows 7, Windows Vista and Windows XP

AVG Anti-Virus Free Edition is only available for single computer use for home and non commercial use.

http://free.avg.com/in-en/free-antivirus-download
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Avast Free Antivirus

avast! Free Antivirus represents the best free antivirus protection currently available on the market. This edition is FREE OF CHARGE for non-commercial & home use. Its features include:

• Anti-spyware built-in
• Web Shield
• Anti-rootkit built-in
• Automatic updates
• Strong self-protection
• Virus Chest
• Antivirus kernel
• System integration
• Simple User Interface
• Integrated Virus Cleaner
• Resident protection
• Support for 64-bit Windows
• P2P and IM Shields
• Internationalization
• Network Shield

http://www.avast.com/en-in/free-antivirus-download
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McAfee AVERT Stinger 10.2.0.954

Stinger is a standalone utility used to detect and remove specific viruses. It is not a substitute for full anti-virus protection, but rather a tool to assist administrators and users when dealing with an infected system. Stinger utilizes next-generation scan engine technology, including process scanning, digitally signed .DAT files, and scan performance optimizations. It detects and removes threats identified under the "List Viruses" icon in the Stinger application.

http://www.mcafee.com/us/downloads/free-tools/how-to-use-stinger.aspx
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