Interestingly, I got the free version from CNET, but, I can't find a link using a Google Search.
It took forever and a half to download and install AVG9.0, but it seems ok.
One point, not noticed with 8.5, is that I was warned to uninstall my Zone Alarm Firewall as a possible conflict. I went ahead with the download. Also, I could not find the free version at the AVG website, and the installation recommended the installation the AVG toolbar, which I found to be a roundabout way to make Yahoo as default Search engine. I disabled the toolbar.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:18.104.22.168) Gecko/2009082707 Firefox/3.0.14