Antivirus Issues (especially Norton)
Posted by Matthew Yetter on 13 November 2019 08:11 AM
Some users are reporting issues with their antivirus or other internet security software.  These issues include not allowing downloads to begin with, corrupting the installer as it downloads, or quarantining certain files after installation.

It is recommended to temporarily suspend all antivirus software (including Windows Defender) before you begin downloading ZBrush.  Leave it disabled during download, installation and activation.

For Norton users, this alone will not be sufficient due to its Download Intelligence module.  See this link for instructions on how to suspend that feature.  Until you have done so, Norton will not currently allow the ZBrush 2020 installer to even begin downloading from My Licenses. You will also likely have to suspend Norton Safe Search.