Problem after purchasing and installing Theme!!!

hi all im have Problem im purchasing Theme to day in themeforest and im installing but Please have this problem … What is the reason see the screenshot

This got nothing to do with theme itself, but seems to be a “false” alert from your antivirus/firewall/internet security application on your computer directly, which is preventing your browser to upload the theme package to your server. This can only be “fixed” via that software generating that error popup, as it affects your actual internet connection.