Windows Server 2008 R2 WebServer Feature Install Fatal Error – 0x80070643

I tried to change the installed WebServer features on a Windows Server 2008 R2 box and hit the following error:

Installation of [Web Server (IIS)] Management Service failed. Attempt to
install Management Service failed with error code 0x80070643.  Fatal error
during installation
     + CategoryInfo          : OperationStopped: (:) [], CimException
     + FullyQualifiedErrorId : FeatureMessageDetail,Microsoft.Windows.ServerMan
     + PSComputerName        : localhost

So I tried to just uninstall the WebServer and ApplicationServer roles and start over but I got the same error again.

Eventually I found there was a pending update when I tried rebooting the box.  After the reboot everything installed correctly. 

Hope this saves others some time.

Happy Feature Installs!

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