1. Bitdefender Antivirus Pro 2011
Some Of The Features:
- Stop majority of viruses and malware with Proactive Protection
 - Warnings about unsafe pages displayed in search results
 - Eliminate data leaking over email, Facebook, IM...
 - Minimize interruptions with automatic mode activations
 - Basic, Intermediate and Experts interface settings
 
2. Kaspersky Antivirus 2011
Some Of The Features:
- Get Real-time protection against spy-ware and viruses
 - Website and email scanning for malicious code
 - Non Stop Digital identity protection
 - Scan for vulnerabilities and get treatment advices
 - New Easy-access Desktop gadget
 
3. Norton Antivirus 2011
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Some Of The Features:
- Traditionally powerful protection from online threats
 - Fast and instant check of files with Norton Reputation Service
 - Multiple overlapping layers of protection with Norton Protection System
 - Up-to-the-minute updates with Norton Pulse
 - Monitors your PC for suspicious behavior with SONAR 3 Behavioral Protection
 
4. McAffee AntiVirus Plus 2011
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5.ESET NOD32 Antivirus 4
                              ESET NOD32 Antivirus 4 is a proactive antivirus program which  protects your system while you are surfing online. ESET has a  ThreatSense technology which offers protection even against unfamiliar  threats. The best thing about Antivirus 4 is that they keep your system  running smoothly and efficiently while it protects you from threats. The  only way you will know that it is running is the occasional information  system pop up.          
         
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6. Trend Micro Titanium Antivirus
                              Trend Micro Titanium Antivirus, even with its new cloud based  technologies, performed only moderately compared to other superior  antivirus programs.  Its cloud based technologies allows it to protect your computer, better  when compared to its earlier versions. Trend Micro Titanium Antivirus  detects threats even before they enter your computer.          
         
7. Panda Antivirus Pro 2011
                              Panda Antivirus Pro 2011 is an effective antivirus solution. It  is equipped with a number of security tools that make it one of the  most efficient antivirus software available. It is capable of fighting  off even new unidentified threats. Installation is simple but in one  test that was conducted, the presence of malware in the system slowed  down the process. It was easily solved though by using a PSCAN, a tool  provided by the technical support. The software installation ran  smoothly and was completed in just a few minutes.          
         
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8. Avast! Pro Antivirus
                              Avast Pro Antivirus has been the recipient of various awards  because of its efficiency in protecting systems against viruses and  malwares. It combines a number of features which have  made it one of  the best in the industry. It has a built in protection against spyware,  rootkits, Trojans, and other common threats. It has an integrated IM  Shield and a specific defensive tool for P2P file sharing applications.          
         
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9. Spyware Doctor with Antivirus 2011
                              Spyware Doctor with Antivirus 2011 is one of the most effective  tools for protecting your computer against viruses and malware. This  antivirus software has several powerful features, such as IntelliGuard  which monitors each process and restrains behavior patterns similar to  malware. It provides real-time protection for your browser, files,  system, email, cookie guard, site guard, immunizer guard, startup  guards, network, and processes.          
         
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10. CA Anti-Virus r8.1
                              CA Antivirus r8.1 is a comprehensive piece of software which  you can avail of independently or as a component of the CA Threat  Manager solution. When installed in stand-alone mode, it offers  inclusive protection for business PCs, servers, and PDAs. The software  brings together security and strong management features that block and  remove malicious code before it goes through your network. It allows you  to manage different client environments from one web-based console.