HRESULT 0x80240031 (WU_E_INVALID_FILE): meaning and diagnosis

Status / error code:

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Constant name:

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Description:

A file used by Windows Update had an invalid format.

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WU_E_INVALID_PROXY_SERVER	WU_E_INVALID_CRITERIA

WU_E_INVALID_FILE

WU_E_INVALID_FILE means a file passed to Windows Update did not match the format expected at that stage. It can refer to metadata, a scan package, or update-related content, so the file name and preceding component message are essential.

What to check

Use WindowsUpdate.log to identify the file, source URL, or component that rejected it.
Reacquire the file from the intended trusted source instead of copying a similarly named file from another machine.
If this is a managed service, check server synchronization and content integrity before changing the client.

Microsoft: Windows Update log files

Microsoft: Windows Update error reference

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