I wasnt aware that Windo$e had a rescue cd - so I can't understand about the booting from CD option is available - I'll have to read up and see what they are talking about - I guess you have to use a different none W64 computer to get to the AVG website!
I don't use it at all - Windows is such bloat code and so slow that I use Linux and don't bother with paid antivirus software. I do however occasionally search my download folder with Clamav - never had a virus for over 10 years so I'm pretty satified that this virus shit is just that: shit