ERROR_LABEL_TOO_LONG 0x8007009A

Error code 154 · HRESULT 0x8007009A

WINDOWS

The volume label you entered exceeds the label character limit of the target file system.

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_LABEL_TOO_LONG is a Windows error code (system error 154, returned as HRESULT 0x8007009A) reported by Windows. Its official message is: “The volume label you entered exceeds the label character limit of the target file system.”

How to fix ERROR_LABEL_TOO_LONG

  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_INVALID_LIST_FORMATERROR_TOO_MANY_TCBSERROR_TOO_MANY_MUXWAITERSWU_E_NOT_APPLICABLEWU_E_PT_WINHTTP_NAME_NOT_RESOLVEDWU_E_PT_HTTP_STATUS_SERVICE_UNAVAILWU_E_PT_HTTP_STATUS_FORBIDDENWU_E_UH_INSTALLERFAILURE

Source: Microsoft WinError.h

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