A Antivirus related web magazine has publishes the top ten antivirus of 2011-2012 after deep study of the antivirus that are capable of defending your computer from unsafe virus, spyware, Trojans and other forms of malware.  These antivirus software are fully compatible with Windows XP, Windows Vista and Windows 7. Some of these antivirus software are also compatible with MAC operating system and mobile devices. Your traditional antivirus may protect your computer from medium or low risk viruses and spyware. However, to keep your computer protected around the clock from high risk virus and spyware, you need the best antivirus software. Here is the list of the best antivirus and security software of 2011-2012.

1. BitDefender Antivirus (Price: $23.97):
   The antivirus uses advanced technology algorithms and methods to identify security risks and blocks threats even before they try to harm your computer. BitDefender offers top of the line antivirus software for desktop computers, notebooks, MAC computers and mobile devices. It is used by millions of computer users worldwide and also, the price of the antivirus software is quite affordable.
2. Perfect Antivirus (Price: $24.99):
   The security program provides all-round protection from the massive amount of online threats. Perfect Antivirus checks for missing or outdated security software as well as potentially unsafe system settings and monitors the behavior of system processes to detect new and unknown viruses.
3. Norton Antivirus (Price: $39.99):
   Norton is constantly working to add features to their antivirus software to help you protect your computer from harmful viruses and malicious codes. The 2012 version is an improved version of their leading antivirus software. Norton Antivirus is the best antivirus for your desktop, notebook and mobile devices. It is fully tested to work with different operating systems and also compatible with the latest Windows 7 operating system.
   
   
4. Vipre Antivirus (Price: $49.95):
   If Vipre finds any harmful website links, it flags them to inform the user of the potential risks involved. It is a fast antivirus software for home computers and home office computer users. It provides maximum protection while staying easy on system resources; it does not slow down the computer while scanning or updating definitions. Also, a great feature of this antivirus software is the Malware Detection which constantly checks your computer while you browse or navigate over the internet.
5. ESET Nod32 Antivirus 5 (Price: $39.99):
   ESET offers the most efficient antivirus software that does not slow down your computer. ESET has won many awards for providing a security solution which is not only fast but also strong. ESET provides the world's fastest and most effective proactive antivirus and antispyware protection for Windows and MAC, desktops, notebooks and mobile devices.
6. Kaspersky Antivirus (Price: $39.95):
   Kaspersky Antivirus 2012 is well known for fast performance and amazing security capabilities. The software is said to be one among the fastest antivirus software that does not slow down the computer at all. It is fully compatible with Windows 7, notebooks, Mac computers and mobile devices.
7. F-Secure Antivirus (Price: $39.99):
   F-secure offers a unique hi-tech antivirus software to protect your computer against the most harmful viruses and spyware. Also, the F-Secure antivirus 2012 can be configured in your native language easily.
8. TrendMicro Titanium Antivirus (Price: $39.95):
   For home and home office users, TrendMicro offers one complete security package that includes award-winning antivirus software, antispyware, protection from phishing websites, firewall and more. What makes TrendMicro software special is that apart from the advanced internet security; it also includes PC performance optimizer and data protection by offering 2GB online storage space.
   
   
9. Zonealarm Antivirus (Price: $19.95):
   ZoneAlarm antivirus software is prepared with Firewall, OS Antispyware and anti-phishing engine. ZoneAlarm Antivirus 2012 scans, detects and removes viruses, spyware, trojans, worms, bots and other malicious codes that may be harmful to your computer. The 2012 version is an improved version which is much faster and more secure than it's previous versions.
   
   
10. McAfee Antivirus Plus (Price: $39.99):
    McAfee is one among the oldest and most experienced company in the computer security industry. With thousands of new viruses created every day, relying on traditional security updates isn't enough anymore. That's where the McAfee Active Protection technology plays a vital role. Although McAfee antivirus is a little slow as compared to other antivirus software, but still it is robust security software for desktops and notebooks.