Article ID: 2775484 - View products that this article applies to.
Assume you have a full installation of either Windows Server 2008 or Windows Server 2008 R2. You upgrade to Windows Server 2012 and choose option "Server with a GUI".
After the upgrade you convert the Server with a GUI installation to Server Core.
In this scenario, if you try to convert back to Server with a GUI, the operation may fail and rollback to Server Core.
This problem occurs due to the following three unused WINEVT registry entries being carried over by upgrade:
Important This section contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
For converting Server GUI to Server Core, you need to remove the registry keys mentioned above.
To delete the unwanted WINEVT registry keys, follow these steps:
For a more information about the Windows Server 2012 Installation Options, visit the following Web site:
Also see, Server Core and Full Server Integration Overview
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.