Internet Explorer proxy settings may not be applied after MS16-077 is installed in Internet Explorer 11 in Windows 7

Symptoms

After you install MS16-077: Description of the security update for WPAD: June 14, 2016, you cannot access websites by using Internet Explorer 11. This may occur if environment Web Proxy Automatic Discovery (WPAD) auto detection fails and if Internet Explorer is set to use a PAC file to determine the proxy server that has both the Automatically detect settings and Use automatic configuration script check boxes selected in the LAN settings of Internet options.

Resolution

To fix this issue, install the most recent cumulative security update for Internet Explorer. To do this, go to Microsoft Update. Additionally, see the technical information about the most recent cumulative security update for Internet Explorer.

Note This update was first included in the MS16-144: Security update for Internet Explorer: December 2016.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminology that Microsoft uses to describe software updates.

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