If you encounter Windows update error codes, you can check the System log in the Event Viewer, typically under the event source “WindowsUpdateClient” (though it doesn’t provide much info as always 😂). Another place to look is in the “C:\Windows\Logs\WindowsUpdate.log” file for Server 2012R2 / Windows 8.1 and below. For the later Windows version, you will need to use Event Tracing for Windows (ETW) to generate diagnostic logs.
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