allegedly it is
allegedly it is to fix Windows Store and TIFKAM AP issues. However afaik those sort of magically disappeared earlier on August 14th...just saying. http://www.zdnet.com/article/microsofts-third-windows-10-cumulative-update-said-to-fix-store-issues/?tag=nl.e539&s_cid=e539&ttag=e539&ftag=TRE17cfd61