I am part of a company, Valdez Youth Awareness Coalition (YAC) and was wondering whether there was any free commercial antivirus software that I could download. I need it soon because I am connected with an unprotected computer.

Hi,
I don't think you will get any Commercial Antivirus Softwares free of charge as they are supposed to be for sale. Most of them will be available as trial version which you can try for some time but you should purchase it to keep it. Almost all of them are selling the licence to use for one year or two.

Kaspersky is one of the best available in the market.

AVG (http://free.grisoft.com/doc/1) is good and free AV

ALso an on line virus and spyware scanner is Trend Housecall (http://housecall.trendmicro.com/)

Kool, and I also should have said FREE or CHEAP, as in $30 or less.

Trend Housecall is great! One of my best friends works for HP and they use that all the time.

Comodo Antivirus allows home and commercial use for free! You can find a link for it here Free Internet Security Software (http://freeinternetsecuritysoftware.com/free-antivirus-software.htm). This is a quality full featured piece of software!