We're running a combination of Windows 10 1609 or 1703 and rolling out windows 10 1709 to all developer systems. We've hit a snag where after the upgrade, running the debugger causes an error code of 403.14 forbidden; the suggestions are to enable directory browsing but that's not really the fix we're after. If we starting with a clean W10 1709 and install all of our development tools, this isn't an issue.

We've repaired the VS installation, re-installed IIS Express but neither seems to do the trick. As a test, we also enabled all the optional IIS features for application and that seems to fix it, but ultimately we'd like to figure out what's causing the problem.

Our environment is Visual Studio 2017, MVC 4, C#7 .NET 4.7.2.

Has anyone else experienced this problem?