Free Antivirus Software
AVG Antivirus Security, Edition 9.0
As outlined by Bright Hub’s own Dan B. in his article entitled “Best Free Antivirus Programs of 2009," AVG comes in on top year after year. The download is compatible with Windows 7, Vista and also XP and features automatic updates. The free version offers a link scanner that protects against visiting known malware sites and of course the antivirus/antispyware engine that detects and protects against the attack of a virus, Trojan or worm.
Avast is also compatible with Windows 2000, Vista, XP and 7. It is geared more for the home computer that is used for sending emails and perhaps doing a bit of web surfing as opposed to the heavily used office computer that uses the Internet regularly for research or stores highly sensitive documents on the hard drive. Of course, for the home based business that might use the desktop for little more than corresponding with clients or customers, this is a good option. It features rootkit and boot-time scanning; it even allows for green computing through lower energy consumption.
Avira AntiVir Personal
This is the best free antivirus software for a computer running UNIX, Windows Vista, 2000/XP and Explorer 6.0 or above. It offers protection against viruses, worms, and also backdoor programs. On the downside, this is for personal use only; thus, a home office computer that is used for more than surfing the ‘Net and sending out emails is outside the permitted license.