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You cannot upgrade the operating system of a clustered server from Windows Server 2003 or later versions
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Applies to: Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)Microsoft Windows Server 2003, Enterprise x64 EditionMicrosoft Windows Server 2003, Datacenter x64 EditionMicrosoft Windows Server 2003, Enterprise Edition for Itanium-based SystemsMicrosoft Windows Server 2003, Datacenter Edition for Itanium-Based SystemsWindows Server 2008 Datacenter without Hyper-VWindows Server 2008 Enterprise without Hyper-VWindows Server 2008 for Itanium-Based SystemsWindows Server 2008 DatacenterWindows Server 2008 EnterpriseWindows Server 2008 R2 DatacenterWindows Server 2008 R2 EnterpriseWindows Server 2012 DatacenterWindows Server 2012 DatacenterWindows Server 2012 StandardWindows Server 2012 StandardWindows Server 2012 EssentialsWindows Server 2012 R2 PreviewMore
When you try to perform one of the following server operating system upgrades, the upgrade is blocked:
Windows Server 2003 to Windows Server 2008 or Windows Server 2008 R2
Windows Server 2008 to Windows Server 2008 R2 or Windows Server 2012
Windows Server 2008 R2 to Windows Server 2012 or Windows Server 2012 R2
Windows Server 2012 to Windows Server 2012 R2
When this problem occurs, the following error message is recorded in the System Compatibility report:
You must make the following changes before upgrading Windows
Uninstall the following Windows components and features: Server Clustering - Please read Microsoft Knowledge Base article: 935197
This behavior occurs because the server is a cluster member. Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2012 R2 do not support an upgrade of clustered servers from previous versions. This is because of incompatibilities between the cluster versions.
To work around this behavior, use one of the following methods, as appropriate for your situation.
Method 1: Clean installation
Perform a clean installation of Windows Server 2008 or a later version on the nodes in the cluster.
Install the Failover Clustering feature, create a new cluster, and then reconfigure the cluster settings.
Method 2: In-place migration
To perform in-place migration, go to the following Microsoft website for more information: