AVG Anti-Virus Free Edition is a free anti-virus protection tool  for home use. It has improved virus detection based on better heuristics and NTFS data streams scanning with smaller installation and update files. It has improved user interface

 

 

 

 

 

Avira AntiVir PersonalEdition Classic is a free Anti Virus software. It reliably protects your private computer against dangerous viruses, worms, Trojans and costly dialers.

 

 

 

 

Are you worried about getting a virus in your E-mail? This free program aims to help you to protect your computer from receiving virus infected E-mails. When an incoming E-mail or file is suspected to be containing a virus, VCatch automatically deletes it and notifies you.

 

 

 

 

Avast! 4 Home Edition is a full-featured antivirus package designed exclusively for home users It features outstanding detection abilities, together with high performance

Web Shield is a unique feature of avast! that enables it to monitor and filter all HTTP traffic coming from the Web sites on the Internet. Since an increasing number of viruses (and other malware, such as adware, spyware and dialers) are being distributed via the World Wide Web, the need for an effective countermeasures has also increased. 

Both the virus database and the program itself can be updated automatically. The updates are incremental, with only new or missing data downloaded: thus reducing the transfer heavily