August has seen a flurry of buggy patches:
Win10 1607 – KB 4033637, which arrived last Friday via Auto Update, was documented early Thursday morning. It's an update to the Compatibility Appraiser, to make it easier for Microsoft to upgrade your version of Windows.
Win10 1507 and 1511 – KB 4033631 remains undocumented and was similarly pushed thru Auto Update (on Friday?). It's also likely an update to the Compatibility Appraiser.