ERROR_CLUSTER_SINGLETON_RESOURCE 0x80071734

Error code 5940 · HRESULT 0x80071734

WINDOWS

Only one instance of this resource type is allowed in the cluster.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_CLUSTER_SINGLETON_RESOURCE is a Windows error code (system error 5940, returned as HRESULT 0x80071734) reported by Windows. Its official message is: “Only one instance of this resource type is allowed in the cluster.”

How to fix ERROR_CLUSTER_SINGLETON_RESOURCE

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_CLUSTER_EVICT_INVALID_REQUESTERROR_CLUSTER_GROUP_SINGLETON_RESOURCEERROR_CLUSTER_RESOURCE_PROVIDER_FAILEDERROR_CLUSTER_RESOURCE_CONFIGURATION_ERRORERROR_FILE_SHARE_RESOURCE_CONFLICTERROR_NONCORE_GROUPS_FOUNDERROR_CLUSTER_OBJECT_ALREADY_USED

Source: Microsoft WinError.h

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