Microsoft Security Essentials

Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software.

Microsoft Security Essentials is a free* download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It’s easy to tell if your PC is secure — when you’re green, you’re good. It’s that simple.

Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want—without interruptions or long computer wait times.

Homepage: http://www.microsoft.com/Security_essentials

Dr.Web Cure-It!

Cure your computer of viruses, Trojans, spyware and other malicious programs with Dr.Web CureIt!, which uses the Dr.Web engine. There is no need for installation and therefore this is an ideal on-demand scanner as there is no conflict with your primary AV. The utility is always armed with the most up-to-date add-ons to the virus databases.

Homepage: http://drweb.com

Winpooch

Winpooch is a free and open source program that detects and blocks spyware from computers running Microsoft Windows. It also detects trojans and can associate with the ClamWin and BitDefender antivirus software to provide real-time protection.

Homepage: http://winpooch.free.fr

Comodo

Developed by one of the world’s leading IT security providers, Comodo AntiVirus leverages multiple technologies (including on demand & on access scanning, email scanning, process monitoring, worm blocking and host intrusion prevention) to immediately start cleaning or quarantining suspicious files from your hard drives, shared disks, emails, downloads and system memory. Updated virus definitions are automatically downloaded according to a schedule of your choice or by a single click on the 'updater' button. Once installed, Comodo AntiVirus 2.0 beta will unobtrusively sit in your system tray, silently and efficiently defending your system from the latest virus outbreaks.

Homepage: http://antivirus.comodo.com

Avira AntiVir

AntiVir PersonalEdition Classic is freeware. This application is for personal usage only. Like most antivirus software, it scans disk for viruses and also runs as a background process, checking each opened and closed file. It can detect and possibly remove rootkits.[2] It also performs Internet updates (daily by default) in which it opens a window, with an advertisement suggesting the user to purchase AntiVir PersonalEdition Premium.

Homepage: http://www.free-av.com

AVG Antivirus

AVG Free Edition is the well-known antivirus protection tool. AVG Free is available free of charge to home users for the life of the product. Rapid virus database updates are available for the lifetime of the product, thereby providing the high level of detection capability that millions of users around the world trust to protect their computers. AVG Free is easy to use and will not slow your system down (low system resource requirements. Highlights include automatic update functionality, the AVG Resident Shield, which provides real-time protection as files are opened and programs are run, free Virus Database Updates for the lifetime of the product, and AVG Virus Vault for safe handling of infected files.

Homepage: http://www.download.com

BitDefender

BitDefender 8 Free Edition is your chance to use one of the world's most effective antivirus engines for free! BitDefender 8 uses the same ICSA Labs certified scanning engines found in other BitDefender products, allowing you to enjoy basic virus protection for no cost at all. BitDefender 8 Free Edition is an on-demand virus scanner, which is best used in a system recovery or forensics role. If you are on an "always-on" Internet connection, we strongly advise you to consider using a more complex antivirus solution.

Homepage: http://www.bitdefender.com

PC Tools Antivirus

Since 1998 PC Tools, formerly known as WinGuides.com, has developed and distributed PC security and optimization software for the Microsoft Windows platform.

Products include:

• Spyware Doctor — an anti-spyware and malware removal product
• Registry Mechanic — a repair and optimization product for the Windows registry
• PC Tools AntiVirus — an antivirus program
• Privacy Guardian — a privacy product to clean up internet and PC usage history
• File Recover — a file recovery and undelete program
• Spam Monitor — an antispam program
• PC Tools Firewall Plus— a firewall program
• ThreatFire — a threat protection program
• Pc tools internet security a full internet protection software

Homepage: http://www.pctools.com/free-antivirus

Clam Antivirus

ClamWin is a Free Antivirus program for Microsoft Windows 98/Me/2000/XP and 2003. ClamWin Free Antivirus comes with an easy installer and open source code. You may download and use it absolutely free of charge. It features:

• High detection rates for viruses and spyware;
• Scanning Scheduler;
• Automatic downloads of regularly updated Virus Database.
• Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer;
• Addin to Microsoft Outlook to remove virus-infected attachments automatically.

Homepage: http://clamwin.com

Avast!

avast! 4 Home Edition is a full-featured antivirus package designed exclusively for home users and non-commercial use. Both of these conditions should be met! Our company offers the Home Edition free of charge, since, in our opinion, it is possible to avoid global virus spreading by efficient prevention; however, many users are not able to or do not want to pay for antivirus software. This page will show you the most important features of this program.

Homepage: http://www.avast.com