BEST FREE ANTIVIRUS 2011

    Its always considered  to have an antivirus program in order to secure your computing life.But all the main

stream companies antivirus cost from $9.99 and up.In this situation lets have a look at the freewares 

that are available for your pc.I have given in the order of  best one first

1.AVAST ANTIVIRUS

Core Technologies

Antivirus and anti-spyware engine
Innovative scanning engine protects against viruses, spyware, and other malicious agents.
Real-time anti-rootkit protection
Prevents stealth malware (‘rootkits’) that, when loaded by the computer’s OS, are invisible to ordinary scanners.
avast! WebRep
Provides website reliability and reputation ratings according to community-provided feedback.
avast! CommunityIQ
Our technology uses a global network of sensors to provide us with data taken (anonymously) from the actual web-browsing experiences of an opt-in group of avast! users. This info is then used to protect all avast! users with the most up-to-date information on viruses and infected websites. Because of avast! CommunityIQ, avast! has discovered 81,156 infected websites and protected 126,435,903 people from visiting them in the last 30 days.

Hi-Tech Features

Boot-time scanner
Scans your computer for infections before the OS can start to activate any viruses beneath it (now applies also to 64-bit versions of Windows 7 and Windows Vista).
avast! SafeZone
Opens a new (clean) desktop so that other applications don’t see what’s happening – perfect for banking or secure ordering/shopping – and leaves no traces once it’s closed.
AutoSandbox
Prompts users to run suspicious applications in the virtual Sandbox environment.
avast! Sandbox
Provides an extra layer of security for you to run your PC and its applications in a virtual environment – where any attacks are thus targeted (instead of your real PC).
Intelligent Scanner
Reduces the number of required file scans up to 80% through a white list of safe applications. Files identified as safe are not rescanned unless they change.
Silent/Gaming Mode
Automatically detects full-screen applications and disables pop-ups and other notifications without compromising security.
Green computing
Leaves a minimal “footprint” due to its efficient and effective technology.

avast! Real-time Shields – a team of 24/7 guards

File System Shield
Real-time scanning of opened/executed files.
Mail Shield
Scans all incoming/outgoing email for malware (a special plug-in is used for MS Outlook).
Web Shield
Scans all visited web pages, downloaded files, and java scripts. Thanks to the intelligent stream scanning feature, the Web Shield doesn't slow your web browsing.
P2P Shield/IM Shield
Checks files downloaded via P2P programs and while using IM or “chat” programs.
Network Shield
Protects against network-based viruses with two main components: a URL blocker for malicious URLs, and a lightweight intrusion-detection system.
Script Shield
Detects malicious scripts hidden in web pages and prevents them from hijacking and potentially damaging your computer.
Behavior Shield
Stops ‘zero-day’ threats and unknown malware before virus definitions have been obtained.

Others

64-bit support
Supports the 64-bit architecture platforms of Windows 7 and Windows Vista.
Heuristics engine
Proactively finds malware undetectable with normal definitions and virus signatures.
Code emulator
Uses dynamic translation (a method much faster than traditional emulation) for both generic unpacking and within the heuristics engine.
Automatic processing
Infected files are processed automatically, without requiring user instructions.
Smart virus definition updates
Incremental updating minimizes the size of regular update files.
Fast application of updates
New format for the virus definition file means faster updates and reduces demand on CPU/memory, for uninterrupted computing.
Multi-threaded scanning optimization
Allows the splitting of large files between cores, which accelerates the scanning process on new multi-core CPUs and makes avast! run even faster.
Wake-up/Scheduled scanning
Schedule scanning at night or whenever you don’t need to use your PC.
Command-line scanner
Runs a scan directly from the command line.

System Requirements

Operating Systems Supported

• Windows 7
• Windows Vista (any Edition excl. Starter Edition)
• Windows XP Service Pack 2 or higher

Minimum Hardware Requirements

• Processor Pentium 3
• 128 MB RAM
• 100 MB of free hard disk space

Please note that avast! Pro Antivirus runs only on PCs with Windows XP and newer. Older Windows operating systems (Windows 95/98/ME/NT/2000) are not supported.

DONLOAD HERE

2.PANDA CLOUD ANTIVIRUS

The cloud-based functionality doesn't mean you...

Panda Cloud Antivirus is a lightweight antivirus that takes care of your system without necessarily taking half of your resources or showing nagging windows all the time.

The trick is that Panda Cloud Antivirus is based on so called cloud computing, and is only partially installed on your system and keeps core files on a dedicated server on the Internet. Thanks to this special cloud structure, Panda Cloud Antivirus doesn't have to be manually updated. You can simply forget about complicated configurations and having to download new signature files!

Pros

• Much lighter than traditional antivirus apps
• Easy to install and use
• No nagging messages
• No need to worry about updates
• Behavioral analysis
• cons
  • No automatic scans
  • No extra filters for web browsing or email
   and block

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3.AVIRA ANTIVIRUS

• Pros
  Quick install, small footprint. Rescue CD solved many installation problems. Very effective at preventing malware installation on a clean system. Free!
• Cons
  Poor removal of detected malware threats, some remained running. Deleted some valuable files it could have disinfected. Failed to remove detected rootkits.
   bottomline:Avira AntiVir Personal does a great job keeping malware from infesting your pc.
  :
  
  
  
  

DOWNLOAD HERE

4.MICROSOFT SECURITY ESSENTIALS

Microsoft hit the nail on the head with Security Essentials -- this antivirus suite is simple to use, proactive, and best of all, free of charge for genuine Windows users. It is also extremely efficient with system resources. Security Essentials is not as fully-featured as other players' antivirus suites including Norton and ESET, but it provides as the name implies -- essential protection. I personally would not have a problem paying for this software if Microsoft charged for it.

To those looking for an antivirus suite or want to upgrade their existing, we highly recommend investing two minutes to download and install Microsoft Security Essentials.

Pros:
free
quick response
little usage of system resources

Cons:

less features
slow scan
require wga validation

DOWNLOAD HERE

5.AVG ANTIVIRUS

AVG Anti-Virus is one of the handiest free antivirus systems available for personal users.

Despite being a free security tool, AVG Anti-Virus is as good as any paid app. It features a bunch of dedicated modules to protect you from antivirus, spyware, rootkits and spam, and also includes the so called LinkScanner – an extra layer of protection that checks search results and web links to make sure they’re safe.

One of the best things about AVG Anti-Virus is that it offers neat, effective protection while staying silently minimized in your system tray, without guzzling system...

Pros

• Works silently in the background
• Frequent automatic updates
• Includes antispyware tool, email protection and web browsing filter

Cons

• Nagging registration window
• Doesn't include all the features of the Professional version

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6.EMSISOFT ANTIMALWARE

• 
  
  
  Pros
  Twin-engine on-demand scanner has very high malware-detection rate. Blocks access to known malicious Web sites. Quarantines some malware on download. Warns of specific behaviors that may indicate malware. HijackFree utility aids in system exploration.
  Cons
• Program fails to thoroughly remove detected malware. Explicitly identifies valid programs as malware. One-dimensional behavior blocking blocks many valid programs.
 Bottom Line Emsisoft Anti-Malware 5.0 is great at finding malware; too bad it flopped at removing what it found. It erroneously flagged several valid programs as specific, named malware, and its behavior-based detection kills both good and bad programs.

 

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7.COMODO ANTIVIRUS

Comodo Internet Security 2011 is the free, multi-layered, security application that offers complete protection from viruses, Trojans, worms, buffer overflows, zero-day attacks, spyware and hackers. Built from the ground upwards with your security in mind, Comodo Internet Security combines powerful Antivirus protection, an enterprise class packet filtering firewall, advanced host intrusion prevention, application control and anti-spyware in one supremely powerful application. The latest version sees a major leap forward in security and usability with the addition of cloud based virus-scanning and behavior analysis of unrecognized files - making CIS 2011 unbeatable at detecting zero-day attacks. Under default settings, unknown and untrusted files are automatically scanned by our cloud-based virus scanners then, while the file undergoes behavior analysis on our cloud server, it is run in a sandbox on your local machine so that it cannot modify or affect data on your 'real' system. Put simply, this ground-breaking method of protecting your PC means that only trusted applications are allowed to run on your computer. Malware and untrusted files get nowhere near anything important AND you get to use your computer without interruption from nagging alerts. CIS 2011 also features a friendly graphical user interface; granular configuration options; easily understood and informative alerts; wizard-based detection of trusted zones and much more. Comodo Internet Security delivers enterprise class protection and can be used out of the box - so even the most inexperienced users will not have to deal with complex configuration issues after installation. Comodo Internet Security is available in many different languages and is free for life.

              DOWNLOAD HERE

8.RISING ANTIVIRUS FREE

RISING Antivirus Free Edition is a full-featured antivirus program that protects your computers against all types of viruses, Trojans, Worms, Rootkits and other malicious programs. It offers real-time protection, email scanning (POP3/SMTP), automatic updates, scheduled scans and all others standard features, as well as a set of advanced system protection tools that monitor for system changes, suspicious application behavior and other potential issues. The free version offers the same level of protection as the commercial version but does not include a firewall.

The effectiveness of this product has been certified by these independent labs: WestCoast Labs, VirusBulletin (VB 100)

                                  DOWNLOAD HERE

.9.PC TOOLS ANTIVIRUS

• Protection
  Basic antispyware and antivirus protection while you’re working, surfing and playing
• File Guard
  File Guard scans and blocks malware in real-time
• Search Defender
  Search Defender, built on Browser Defender technology, warns you about unsafe or phishing websites
• Smart Updates
  Smart Updates automatically check for updates against the latest threats
• Free Antivirus Software
  It's FREE! PC Tools believes everyone has the right to basic protection

Basic FREE antivirus protection against known viruses and malware.

With PC Tools AntiVirus Free, you are protected against basic cyber threats attempting to gain access to your PC. Don't risk going online without protection. Dangers include virus infections or getting your identity stolen - download PC Tools software today for enhanced protection!

If your PC gets infected, viruses may attempt to spread to your friends, family and associates by accessing your email contacts and other PCs within your network. A computer virus may also create a backdoor that allows hackers to access files on your PC, launch attacks against other computers or websites, or send SPAM email.

Downloading PC Tools AntiVirus Free provides basic antivirus and antispyware protection, with Smart Updates to keep your PC safe, File Guard™ to provide real-time protection and Email Guard to protect your computer from viruses and spyware being sent over email. PC Tools AntiVirus Free was created by the makers of award-winning Spyware Doctor, a highly trusted product used by millions worldwide.

                                            DOWNLOAD  HERE

10.MALWARE BYTES ANTIMALWARE

Malwarebytes Anti-Malware is a surprisingly effective freeware antimalware tool. It's a relatively speedy malware remover, with the quick scan taking about 8 minutes even with other high-resource programs running. The heuristics engine proved on multiple computers during empirical testing that it was capable of determining the difference between false positives and dangerous apps.

The app has some nice features rolled in, too. It supports multiple drive scanning including networked drives, context menu options including a scan-on-demand for individual files, and the FileAssassin option under the More Tools section for removing locked files. The interface is simple, but pleasant-looking and well-organized. Tabs live just below the oversized logo, with few options per tab to keep down the clutter. The installation process was fast enough, but interestingly offered up the well-kept changelog and an instant definition file update.

Do note that the real-time protection is restricted to the paid version, as is the scheduler for updates and scans. Overall, though, Malwarebytes Anti-Malware is a responsive malware remover that does what it should with a minimum of fuss.

 
                                   DOWNLOAD HERE                   

11.AD-AWARE FREE INTERNET SECURITY

Core Virus and Spyware Protection Trusted by Millions Worldwide

We have taken the security product millions of people know and trust one step further to give all users the power to protect themselves online. By combining Lavasoft's pioneer anti-spyware technology with traditional anti-virus protection, Ad-Aware Free now features complete malware protection, that won't slow your computer down!

Ad-Aware Free Internet Security features real-time protection, advanced Genocode detection technology, rootkit protection, automatic updates, and much more — to ensure that you have the power to protect yourself online.
     Shop, bank, e-mail, and watch videos online
    We keep you safe from password stealers, keyloggers, virus, spyware, rootkits, trojans, online fraudsters, identity thieves and other potential cyber criminals.
    Download photos, music, and other files with confidence
    Ad-Aware's behavior-based detection finds suspicious files and threats before they integrate into your PC and attack your personal information.
    Get Peace of Mind
    Know that your personal information is kept safe from dangerous intruders and prying eyes.

full powered anti-virus + anti-spyware with no strings attached.

• New!Comprehensive Malware Protection
• Ad-Watch Live! Basic Real-time Protection
• Genocode Detection Technology
• Behavior-Based Heuristics Detection
• Rootkit Removal System
• The Neutralizer Malware Removal Tool
• The Scheduler
• Easy to Install & Use
• Automatic Updates

                                                                      

           DOWNLOAD  HERE

**Special thanks for download.com,softpedia.com,softonic.com and others for providing details..