If you need to find out what a recent security update in Windows 10 is about, open settings and go to Update & Security.
Click Update & Security>Advanced Options>View your update history. There are now 9 total updates since July 29th, 2015.
Latest two are KB3081444 and KB3081441, which came in 08/18/2015. More information about either can be gotten by clicking the blue hyperlink under Successfully Installed. Clicking this link will result in drop-down window with a direct hyperlink to the KB in question. Click Support info for a direct link to the KB article.
See attached below:
URL for same link:
https://support.microsoft.com/en-us/kb/3081444