I am having the same issue, maybe but possibly not for same reason.
With windows 8 (later 8.1), and with office 2010 on the system, I had windows update misconfigured to only update upon request. I since installed office 2013 (office 365) on the system, and uninstalled office 2010. I suspect at some point the office 2010 update (Service Pack 2 for Microsoft Office 2010 (KB2687455) 32-Bit Edition) was downloaded to the system, but was not installed, before I unintalled office 2010.
To make things more interesting I installed windows 10 a few days ago, but this was happening with windows 8.1 as well, and I don't think affects the core issue
Now I keep getting the annoying daily error in windows update history
Service Pack 2 for Microsoft Office 2010 (KB2687455) 32-Bit Edition
Failed to install on <date>
Reading eightforums.com tutorial, I ran Disk Cleanup, but it did not show Windows Update Cleanup (I think that was what was stated in tutorial) option for cleanup.
Any ideas how to remove the downloaded update? I suppose I could reinstall office 2010, but that seems drastic.