WSUS post-installation task fails after Inplace-Upgrade


After In-place upgrading from Windows Server 2008 R2 to Windows Server 2012 R2 (not a good idea in production environment) and activating the new Windows Server Updates Services Role, I´ve encountered several errors. The machine had also the System Center Configuration Manager 2012 R2 installed.

The post-installation task ended with the error Failed to start and configure the WSUS service.

WSUS Post-Installation Task failed


A manually start did not work either (Error 193: 0xc1):

WSUS Post-Installation Error 193



CCMSetup (SCCM) created a file called Program in the root folder and the WSUS Application Pool ran under the wrong .NET CLR Version.

CCMSetup Error



Delete or rename Program file and change the .NET CLR Version from .NET 2 to .NET 4.

Change .NET CLR Version


After an IISReset restart the Post-installation tasks of WSUS:

Post-Installation Task finishing



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