ERROR_MORE_WRITES 0x80070460

Error code 1120 · HRESULT 0x80070460

WINDOWS

A serial I/O operation was completed by another write to the serial port. (The IOCTL_SERIAL_XOFF_COUNTER reached zero.)

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_MORE_WRITES is a Windows error code (system error 1120, returned as HRESULT 0x80070460) reported by Windows. Its official message is: “A serial I/O operation was completed by another write to the serial port. (The IOCTL_SERIAL_XOFF_COUNTER reached zero.)”

How to fix ERROR_MORE_WRITES

  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_MORE_DATAERROR_IO_DEVICEERROR_DLL_INIT_FAILEDERROR_IRQ_BUSYERROR_ELEVATION_REQUIREDERROR_UNRECOGNIZED_VOLUMEERROR_SERVICE_REQUEST_TIMEOUTERROR_SERVICE_DISABLED

Source: Microsoft WinError.h

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