this is not a conversation per say, it's just to warn Community that a Windows patch can give you quite a headache !
It all started with my FDS copy of FMS having an issue with Web access. FMS is installed on Windows 10 Pro - and that's not the issue - A few weeks ago Web access stopped working. Finally during the weekend I looked after the issue - nothing was urgent, it's only a test server.
FMS console states that the Web Engine runs, but any access by Web would failed in error 503. It happened that IIS could not start at all. After pulling my hair for a while I founded out that it's a Windows patch that broke IIS.
Windows 10 and Windows Server 2016
Googling about that issue, I came across a Microsoft Support document: https://support.microsoft.com/en-us/help/4050891/error-http-503-and-was-event-5189-from-web-applications-on-windows-10
You may read the complete article to get the details, but here are the steps to fix the issue:
To resolve this problem, manually delete the symbolic links that are created by Windows Update. To do this, follow these steps.
Note Symbolic links can be deleted the same as regular files.
- Open a Command Prompt window by using the Run as administrator option.
- Run the following commands:
net stop WAS /y
rmdir /s /q C:\inetpub\temp\appPools
net start W3SVC