I don't know what happened but I've already answered, before your question.
The problem I'm facing is still the problem, I've followed the Microsoft guide to make a clean boot, but when I launch FRST.exe the computer crash with a blue screen.
The only problem I'm facing is the bestprosoft.com popup that open with Firefox always when I start Windows 10 pro.
I've already followed the instructions of your colleague, before to post here and he told me to write to you, and there's no presence of Malwares, Spywares, and so on. With all tools that he told me to use the response was that the computer is cleaned.
I've already removed all voices (just few) of bestprosoft.com under registry. But if I'm still facing this problem I'll make a full format and a clean install of Win10.
Thank you for your help.