One of my customers is reporting an error in my software that can reproduced only when Avast is involved. After installing and registering Avast version 2015.10.0.2208 on Windows 7 Professional 64 bit, I see the Deepscreen setting but not its nested setting Use secure virtual machines. I am unable to reproduce his problem. Is it likely that I will have to purchase Avast before I'll be able to reproduce his problem?