It's generally understood that when Windows fails to install an update, an entry goes into Setting > Windows Update > Update History, giving the update name/KB number and error code.
However, what I only recently suspected and confirmed today is that if an update then is installed successfully, the record in that list of its failure to install is erased. Something that's also slightly perturbing is that during the session that the update successfully installs, the update history isn't updated to show the success, the update simply disappears from the pending list as if nothing has happened (no requirement to restart either in this update's case).
The failure entry is still in the main event log though.
However, what I only recently suspected and confirmed today is that if an update then is installed successfully, the record in that list of its failure to install is erased. Something that's also slightly perturbing is that during the session that the update successfully installs, the update history isn't updated to show the success, the update simply disappears from the pending list as if nothing has happened (no requirement to restart either in this update's case).
The failure entry is still in the main event log though.