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ERROR_CLUSTER_WRONG_OS_VERSION
ERROR_CLUSTER_WRONG_OS_VERSION means the computer cannot join because its Windows version or clustering capability is not compatible with the existing cluster.
Compare the candidate node build, edition, clustering feature, and the existing cluster’s upgrade state. Correct version compatibility first; network, credentials, and quorum troubleshooting cannot make an unsupported node version join.
What to check
- Compare Windows Server version, edition, cumulative update level, and installed Failover Clustering features across nodes.
- Check whether the cluster is operating at a functional level or feature set the new node does not support.
- Run focused validation before adding or upgrading a node.
Get-ComputerInfo | Select-Object WindowsProductName, WindowsVersion, OsBuildNumber
Microsoft: Validate hardware for a failover cluster
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