avast! 4 Home Edition
avast! 4 Home Edition is a free antivirus solution for non-commercial home use. It scans for all types of malware on: disk, CDs, in E-mail, HTTP, NNTP, IM and P2P. Incremental updates of the virus database and program are small, fast and reliable.
This program is free for home use.
I would say it is excellent, but I'm not technically knowledgable enough.
Considering the price, and good reviews by others, I use it, and have had no known problems.
