What is the best free antivirus software?

AVG,Avast, Avira AntiVir...

These programes have resident shields... there are other free antivirus as ClamAV, a-squared Free,Comodo AV , etc.
BTW I use Kaspersky - it is not very expensive.

Ive been using BitDefender for 2 yrs now. I really like it.
Its my first all-in-one.
Before that I used Avast and Ad-Aware with Sygate Firewall.

Hope this helps,

Ive been using BitDefender for 2 yrs now. I really like it.
Its my first all-in-one.
Before that I used Avast and Ad-Aware with Sygate Firewall.

Hope this helps,
Does Bit Defender free have a resident shield? I was said that BitDefender Pro is a very good software but I have never tried it.

Yes it does,

BitDefender 2008 Product Suite (http://futurenow.bitdefender.com/antivirus-comparison.html)

Take care,

Symantec's Norton Anti-Virus, McAfee VirusScan, Quarterdeck ViruSweep, or Dr. Solomon's Anti-Virus. Those major developers can be relied upon to release timely periodic updates that deal with new viruses.

Symantec's Norton Anti-Virus, McAfee VirusScan, Quarterdeck ViruSweep, or Dr. Solomon's Anti-Virus. Those major developers can be relied upon to release timely periodic updates that deal with new viruses.
I think the keyword from the original post was *free*, and most of those aren't.

Tanstaafl:)

Norton Security Scan, free antivirus solution (http://www.norton-antivirus-2007.net/index.asp?PID=276bc955-489b-4021-8e13-9fa224f7f8e5&track=broadcontent)

Just found this... I use Norton(not the free one), it works well. I hope this one helps.:)

The best of anti-virus is Bitdefender.. Its have a free version..