Avira AntiVir Personal – FREE Antivirus is a reliable free antivirus solution, that constantly and rapidly scans your computer for malicious programs such as viruses, Trojans, backdoor programs, hoaxes, worms, dialers etc. Monitors every action executed by the user or the operating system and reacts promptly when a malicious program is detected.

• Detects and removes more than 150,000 viruses

• Always among the winners of comparison test featured in computer journals

• The resident Virus Guard serves to monitor file movements automatically, e.g. downloading of data from the internet

• Scanning and repair of macro viruses

• Protection against previously unknown macro viruses

• Protection against trojans, worms, backdoors, jokes and other harmful programs

• AntiVir protection against viruses, worms and Trojans

• AntiDialer protection against expensive dialers

• AntiRootkit protection against hidden rootkits

• AntiPhishing protection against phishing

• AntiSpyware protection against spyware and adware

• NetbookSupport for laptops with low resolution

• QuickRemoval eliminates viruses at the push of a button

• Easy operation

• Internet-Update Wizard for easy updating

• Protection against previously unknown boot record viruses and master boot record viruses.
  

Size : 79.61 MB

AVG Anti-Virus Free Edition 2011 (Free anti-virus, anti-spyware and LinkScanner software. Fewer features than the paid versions.) Although AVG has flagged a little in the past few years, AVG Anti-Virus Free 2011 breathes some new life into one of the most popular security programs around with a shorter install, better usability, and faster scans.

Source : www.avg.com

Size : 5.4 MB

Microsoft Security Essentials (MSE) is a free antivirus software product created by Microsoft that provides protection against different types of malware such as computer virus, spyware, rootkits and trojan horses for Windows XP (x86), Windows Vista, and Windows 7 (both x86 and x64). Microsoft Security Essentials replaces Windows Live OneCare, a commercial subscription-based antivirus service and the free Windows Defender, which only protected users from adware and spyware. Unlike Microsoft Forefront family of enterprise-oriented security products, Microsoft Security Essentials is geared for consumer use.

Microsoft Security Essentials received positive reviews upon its release.

Size : 7.1 MB