Is there any free edition antivirus can be download online? if you can come up with more advantages and disadvantades of those antivirus is much better.

thanks in advance.

avast! Free Antivirus is the best virus and spyware protection available. Download the world's most popular antivirus software completely free.

see download.com, at the right sidebar, you will the most popular download, and in this list, there are some antivirus software for Windows 8. They are most popular!