I am having the same issue, so I downloaded Malwarebytes and it found 4 Trojans. I am not a computer savvy kind of gal, but like you I paid good money to have this resolved and am left scratching my head... :/
When I click the "Open scan in a new window" this is what I see... Boot sector of disk C: - error opening Boot sector of disk D: - error opening C:\hiberfil.sys - error opening C:\pagefile.sys - error opening C:\swapfile.sys - error opening Also it finds a Trojan every single day. I definitely have a virus, but I am unable to resolve it. Help... Please?