ERROR_MEMBER_IN_GROUP 0x80070528

Error code 1320 · HRESULT 0x80070528

WINDOWS

Either the specified user account is already a member of the specified group, or the specified group cannot be deleted because it contains a member.

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_MEMBER_IN_GROUP is a Windows error code (system error 1320, returned as HRESULT 0x80070528) reported by Windows. Its official message is: “Either the specified user account is already a member of the specified group, or the specified group cannot be deleted because it contains a member.”

How to fix ERROR_MEMBER_IN_GROUP

  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_MEMBER_IN_ALIASERROR_MEMBER_NOT_IN_GROUPERROR_MEMBER_NOT_IN_ALIASERROR_LOGON_FAILUREERROR_NO_SUCH_GROUPERROR_GROUP_EXISTS

Source: Microsoft WinError.h

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