Cannot create Cluster – the computer X is joined to a cluster

Recently attempting to install a new three node cluster I ran into a new issue. Once I was able to run a successful “Cluster Validation Check” and chose the option to install a new cluster I received a message “The computer xxx is joined to a cluster”.




My first thought then was to remove clustering and try a fresh install of the feature.  That didn’t go to well either, I was informed that the node was an active node of a cluster that it in fact was NOT.


I did a bit of research and found that I could clear this with using PowerShell. To do so I had to open PowerShell as an administrator and load the failoverclusters module. Then I could run the command clear-clusternode to forcefully clean up the cluster node.


Once the node was cleaned up I was able to proceed with the cluster build.


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2 Responses to Cannot create Cluster – the computer X is joined to a cluster

  1. wbbeasley says:

    So do you know what triggered the original error. Were you going from a 2 node cluster to a 3 node cluster or something?

    • Tim Radney says:

      I haven’t been able to pinpoint the issue but I am leaning towards a GPO. Even after doing the fix, I didn’t create the cluster until the next day and the issue had come back. I had to run the PowerShell command again, built the cluster and so far so good. It has been a week.

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