Microsoft is rolling out a cumulative update for Windows 10, identified as KB 3081424, which replaces the earlier cumulative update KB 3074683, which, in turn, fixed a Windows Explorer crash caused by KB 3074681. To install KB 3081424, you must already have KB 3074683 on your machine. This should be a given, since updates are forced onto Win10 Home and Win10 Pro machines that arenít attached to an update server.

As best I can tell, this is the first post-July 29 cumulative update for Windows 10. Itís huge, with many hundreds of changed files in the manifest.
In installed updates, it removed KB3074683 ( not showing anymore ). I checked it before and after the update.