How can I get the powerful antivirus for free ???

There are a few free anti-virus programs. The one I have used most is AVG Anti-virus.

http://free.grisoft.com/doc/2/

How can I get the powerful antivirus for free ???internet security software

AVG http://free.grisoft.com/doc/download-fre...

Not to powerful, but it is useful and it works!

Also it is illegal so i don't suggest it, but you could try searching limewire for cracked software.

How can I get the powerful antivirus for free ???moto guzzi

Ad-Aware.
check out

http://computer-probs.blogspot.com/

It not only gives complete solutions but also offers

free downloads of effective softwares which can detect

and eliminate all spy ware /virus /ad ware /Trojans completely.
http://www.activevirusshield.com/antivir...
Go to www.Grisoft.com where you can download a free antivirus program that updates daily.
AVG Free Edition. It found and got rid of viruses and trojans on my computer!!!
Download AVG...

AVG Free: http://free.grisoft.com/doc/downloads-pr...
AVG is great, Just search it on Google. It's free.
I use free AVG. It works great! www.grisoft.com
Aol Virus Shield is the best antivirus, since it was previously kaspersky 7.

Download: http://www.activevirusshield.com/antivir...

But there are more like avast, avg, antivir. Antivir is the second best, but it eliminates 95% of viruses done by a test, while Aol removes 99%. The problem with aol is that they will track your browser history, for their use. While Antivir doesn't.

Antivir doesn't scan your email attachments and it also doesn't have a firewall. Avast does, but the the search determined that avast removes 85% of viruses, much less than Antivir or Aol.

Download Antivir:

http://www.free-av.com/
avast! is a great antivirus, best one for free.
Download Windows Live one One Care and do the Trial! It Really Good!