ERROR_CANT_RESOLVE_FILENAME 0x80070781

Error code 1921 · HRESULT 0x80070781

WINDOWS

The name of the file cannot be resolved by the 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_CANT_RESOLVE_FILENAME is a Windows error code (system error 1921, returned as HRESULT 0x80070781) reported by Windows. Its official message is: “The name of the file cannot be resolved by the system.”

How to fix ERROR_CANT_RESOLVE_FILENAME

  1. Verify the path/file actually exists and is not blocked by antivirus quarantine
  2. Reinstall the application that raised the error to restore missing files
  3. Check the full path spelling (long paths >260 chars need a registry opt-in)

Related errors

ERROR_CANT_ACCESS_FILERPC_S_ENTRY_TYPE_MISMATCHERROR_NO_SITENAMEWU_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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