ERROR_WX86_WARNING 0x8007021B

Error code 539 · HRESULT 0x8007021B

WINDOWS

A warning occurred in the WX86 subsystem.

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_WX86_WARNING is a Windows error code (system error 539, returned as HRESULT 0x8007021B) reported by Windows. Its official message is: “A warning occurred in the WX86 subsystem.”

How to fix ERROR_WX86_WARNING

  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_WX86_ERRORERROR_ABIOS_ERRORERROR_VERIFIER_STOPERROR_TIMER_NOT_CANCELEDCO_E_SERVER_EXEC_FAILUREWININET_E_TIMEOUTWININET_E_NAME_NOT_RESOLVEDWININET_E_CANNOT_CONNECT

Source: Microsoft WinError.h

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