Windows 8.1 / Windows 10 breaks my ASP.NET / IIS : “Service unavailable”

Question

With Windows 8.1 finally released to MSDN/Technet today I came across the following issue running my ASP.NET application after doing an in place upgrade with Win 8.1 RTM:

Answer 1

The Repair worked for me after updating to W10 Insider Preview 160826-1902

Answer 2

For some weird reasons, the only solution for me was to install previous version of the module, from https://www.microsoft.com/en-us/download/details.aspx?id=7435

Answer 3

I encountered the same problem in Windows Server 2012 R2. After I update Windows Updates to newest, it works.

Answer 4

Don't need to uninstall. Just do a Repair instead, and it will works.