Microsoft has released a new preview build of Windows 10 for mobile and PC. Build 14388 is currently available to insiders on the fast ring. Microsoft is preparing for the release of the Windows 10 Anniversary Update on August 2nd. The latest build fixes 44 bugs in Windows 10 including a bunch of fixes to improvement reliability and battery life and improvements to accessibility. The full release notes for the latest Windows 10 build are available now on the Fast Ring of Windows Insider Previews and are available to the public.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-44-bugs-in-windows-10-preview-build-14388-for-mobile-and-pc/