This issue occurs for any of the following reasons:
https://support.microsoft.com/en-us/kb/245142
- You are running personal firewall software or some other security, download assistant, or web accelerator software.
- The Windows Update site control is missing or is damaged on
your computer. - The Hosts file is damaged or contains incorrect
information. - There are missing or damaged Internet Explorer files that display the script on the page.
https://support.microsoft.com/en-us/kb/245142