Today, Microsoft released a cumulative update for PC users that are on the Windows 10 Anniversary Update, build 14393.1670 (KB4039396). Patch Tuesday, the second Tuesday of the month, is typically when the company offers these updates, but lately it's been happening twice a month. But the kicker here is that Anniversary Update users already got a second cumulative update almost two weeks ago, so this is the third. The changelog isn't nearly as long as build 14393.1613, and it mostly fixes issues that were present in the last update.
Full article here: https://www.neowin.net/news/windows-10-for-pcs-build-143931670-is-now-available---heres-whats-fixed