In the past I have not had any issues with Windows Update. My system is Windows 7 Home x64 SP1.
A couple of weeks ago the monthly rollup update came out "September 12, 2017—KB4038777 (Monthly Rollup)". The update failed as follows:
I have Windows Update set to download important updates, but wait until I install them. The update was successfully downloaded.
Opened Windows Update and installed the update. Finished "Successful". Clicked on "Restart". Update got to 30% (as usual) and computer restarted. After restart, system loading looked OK, and the update proceeded to around 70%.
Then it displayed "Failure configuring Windows updates - Reverting changes".
I had tried the update several times since then with the same results (error codes 80073AA2 and 80070570.
I tried the standalone updater for KB4038777, but it failed in the same manner.
Then I tried the standalone updater for KB4038779 (Security-only update), and this update was successful.
I would like to understand better how to troubleshoot these kinds of problems though.
When a monthly rollup update fails, is there any way to know which specific update caused it? And does the "revert" step remove all the updates, or just the failed ones?
And what log file(s) contain such information? I found "WindowsUpdate.log" but there did not seem to be any judgmental information, just activity information.
Same occurrence for the October and November monthly rollup updates (failed), but the Security only updates were successful.
For November, the Windows Update error:
This time I localized the error in the cbs.log file.
You can see it in this file: cbs error log if you search for "80073aa2".
Seems to be related to WmiCmiPlugin, but I have no idea beyond that.
Is further troubleshooting possible?