Best Free Windows 7 Antivirus - avast! Free Antivirus
Make no mistake - free antivirus software is not as capable as paid antivirus software. This should seem obvious - after all, antivirus software is created by very smart people who have made computer security their full time career - but the allure of having a free program is substantial. Most antivirus programs cost over $40 a year, after all.
However, not everyone is in a position to purchase antivirus software, and if that is the case a free antivirus program is far, far better than having no protection at all.
Of the many free Windows 7 antivirus programs available the best is avast! Free Antivirus. Avast! also offers many paid antivirus programs, and the free version is simply a stripped down variant which provides only the core elements required.
Avast! Free Antivirus includes full virus protection including the avast! behavior shield. The behavior shield is a technology which will block a program which avast! believes is behaving in a way which will damage your PC. Avast! also includes frequent antivirus updates including information on the latest threats and protection against viruses transmitted through email, instant messenger and P2P programs.
Avast! Free Antivirus is not without its competition, but it receives my recommendation. Those who for some reason do not enjoy avast! should look at AVG Free Edition, another popular choice.