ERROR_PRIMARY_TRANSPORT_CONNECT_FAILED 0x800702EA

Error code 746 · HRESULT 0x800702EA

WINDOWS

An attempt was made to connect to the remote server … on the primary transport, but the connection failed. The computer WAS able to connect on a secondary transport.

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_PRIMARY_TRANSPORT_CONNECT_FAILED is a Windows error code (system error 746, returned as HRESULT 0x800702EA) reported by Windows. Its official message is: “{Connect Failure on Primary Transport} An attempt was made to connect to the remote server %hs on the primary transport, but the connection failed. The computer WAS able to connect on a secondary transport.”

How to fix ERROR_PRIMARY_TRANSPORT_CONNECT_FAILED

  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_ELEVATION_REQUIREDERROR_NOTIFY_CLEANUPERROR_PAGE_FAULT_TRANSITIONWININET_E_NAME_NOT_RESOLVEDWININET_E_CANNOT_CONNECTWININET_E_SECURITY_CHANNEL_ERRORWININET_E_DECODING_FAILEDCBS_E_SOURCE_MISSING

Source: Microsoft WinError.h

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