Win 8.1 Avast free AV, Avast SafeZone inactive, Windows firewall turned off, no Flash (to eliminate any download manager).] Downloaded the installer from both CNET and then the ZA site itself. When I activate it, it won't download all the necessary files to install the app. Went live chat with ZA, he had no suggestions. There must be something blocking it, but what? I'm not very familiar with 8.1, this is a friend's machine. Thanks for any help!!