What does HRESULT 0x80245109 (WU_E_SIH_POST_REBOOT_INSTALL_FAILED) mean?

Status / error code:

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Description:

A Server-Initiated Healing install failed after reboot.

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WU_E_SIH_NO_ENGINE	WU_E_SIH_UNEXPECTED

WU_E_SIH_POST_REBOOT_INSTALL_FAILED

WU_E_SIH_POST_REBOOT_INSTALL_FAILED means an SIH installation passed into a reboot-required phase but failed when processing resumed after restart. The final code is a pointer to inspect post-reboot servicing evidence.

What to check

Check whether the system completed a full restart and whether another servicing operation is still pending.
Inspect WindowsUpdate.log and %windir%\Logs\CBS\CBS.log around the reboot window for the package-level cause.
Verify the current installation state before retrying, because a partial install or rollback may have changed applicability.

Microsoft: SIH client diagnostic event fields

Microsoft: fix Windows Update corruptions and installation failures

Microsoft: Windows Update error reference

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