Microsoft has released Windows 10 build 14385 for PCs and mobile devices enrolled in the Fast ring of the Windows Insider program, and just as expected, the focus is on bug fixes and performance improvements.
There are absolutely no new features in this build, which makes sense considering we're less than a month away from the public launch of the Anniversary Update, but they have made some very important bug fixes and improvements that "clean up" the operating system.

PC
The PC version of Windows 10 build 14385 comes with a fix for the annoying notification that tells you that Windows will expire on July 15. It also includes improved battery life for Surface devices.
Microsoft says that Spotify shouldn't crash while playing music, and Edge should have a smoother performance, as the browser has received its fair share of patches.
“We fixed an issue that occurred with the LastPass and AdBlock extensions for Microsoft Edge, where it wasn’t displaying the expected menu items. We also fixed an issue where the Edge tab could persist after exiting the Web.”
Dona Sarkar, head of the Windows Insider program, said.
Mobile
Windows 10 Mobile build 14385 fixes known issues from the previous version, so you can now open PDF files in Edge and navigate using touch, and set the SIM name of a dual-SIM phone correctly.
Of course, there are some known issues here too, including voice recording not showing up as an option for call recording and the keyboard not always showing up in InPrivate mode in Microsoft Edge.
