Answered I am trying to use ZA Extreme Security on a Win10 box. After updating the PC to the latest version of Win10, the antivirus definitions update stops at 80% and will sit there overnight. There's no problem with software updates, only the definitions. I have downloaded and installed the latest version of ZA Extreme Security over the version on the PC but still have the same problem. I selected the option to reset the antivirus and firewall settings, rebooted and tried to update the definitions but still have the same problem. Any ideas? Facebook Twitter LinkedIn 0