ERROR_CANCEL_VIOLATION 0x800700AD

Error code 173 · HRESULT 0x800700AD

WINDOWS

A lock request was not outstanding for the supplied cancel region.

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_CANCEL_VIOLATION is a Windows error code (system error 173, returned as HRESULT 0x800700AD) reported by Windows. Its official message is: “A lock request was not outstanding for the supplied cancel region.”

How to fix ERROR_CANCEL_VIOLATION

  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_ATOMIC_LOCKS_NOT_SUPPORTEDERROR_DEVICE_SUPPORT_IN_PROGRESSERROR_BUSYWU_E_SERVICE_STOPSL_E_INVALID_PRODUCT_KEY0xC004F0740xC004C0030xC004C008

Source: Microsoft WinError.h

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