Great stuff Jack but I just thought I'd see if you tried Malwarebytes Anti-Malware. It can be used for free as well. I've used it for years and it has been really valuable.

One additional comment is I did buy the MBAM Pro version and it runs real time and has been quite useful in preventing viruses and blocking hacker websites since it monitors real time and works along side the Avast Antivirus protection I also have installed.