And the Best Anti-virus is… Free Anti-virus!

Free Anti-VirusUsing free anti-virus software to protect your computer is much better than using no anti-virus program at all. You must have antivirus on your PC to keep it safe. Maybe you think that free anti-viruses cannot protect your computer as well as their commercial alternatives, but in many cases, it is simply not true.

Five great anti-virus software products are listed below in this article. With direct links to their official websites, these absolutely free anti-virus products are available for you to download and use. This should greatly help people looking for free alternatives to expensive anti-virus programs.

Active Virus Shield
Windows 98, 2000, ME, XP & Vista, Microsoft Windows XP x64
Active Virus Shield utilizes the latest technology to do both traditional signature-based detection, as well as in-depth scanning of executables. This helps protect against a broader range of known and new viruses, reducing the chances of a virus infection on the user’s computer. Active Virus Shield seamlessly integrates with the Microsoft Windows family of operating systems and is compatible with other PC protection programs (firewalls, anti-spyware, etc.). Always-on, automatically checks for updates every hour - providing real-time scanning and protection against virus threats

Avira AntiVir® PersonalEdition Classic
Free virus protection for Windows 2000/XP/Vista 32Bit and for Linux/FreeBSD/Solaris
Protection against viruses, worms and Trojans; Protection against expensive dialers and phishing; Detects and deletes rootkits;

avast! 4 Home Edition
Windows 95, 98, Me, NT 4, 2000, XP, Windows Vista
A full-featured antivirus package features outstanding detection abilities, together with high performance. 100% detection of In-the-Wild viruses and excellent detection of Trojan horses. The avast! engine also features scan for viruses hidden in Alternate data streams on NTFS volumes. avast! Home Edition contains resident protection of the computer file system and a resident module for e-mails and news.

AVG Anti-virus Free Edition
Windows 98, Me, NT, 2000, XP, Vista, and Vista x64 Edition, and Linux i386
AVG Free anti-virus solution provides the high level of detection capability that millions of users around the world trust to protect their computers. AVG Anti-virus is easy to use with low system resources needs, and automatic update functionality. AVG Anti-virus provides real-time protection as files are opened and programs are run.

BitDefender Free Edition
Windows 98/NT-SP6/Me/2000/XP
BitDefender Free Edition is one of the world's most effective antivirus engines. BitDefender 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 Free Edition is an on-demand virus scanner, which is best used in a system recovery or forensics role.

Also, welcome to browse through other great anti-virus solutions, but they are not free as those ones listed above.