From Mark’s thread below:
AVG Free missed a major viral/trojan infection in my website, even after several scans. I believe they are no longer providing the previously excellent service for free.
After my last crash, I loaded some of my web files from my AVG-“protected” system into my son’s computer and got an instant alarm from AVAST.
Since uninstalling free AVG and installing free AVAST, I have been able to root out this insidious worm beast. For now at least.
Below, a pic from that battle! I lost that one, but have won the war!