Microsoft has just started rolling out Windows 10 build 14959, the latest preview build for Insiders in the fast ring on PC and phone. Today's build features more improvements under the hood, bug fixes and other small changes on the surface.

In what's probably the biggest change this week, Microsoft has started rolling out its new Unified Update Platform, available for Mobile insiders today, which makes downloading new builds faster by simply downloading the new bits needed, rather than a full build.

What's new

  • Unified Update Platform: This build for Mobile is being published using our new update publishing system called Unified Update Platform (UUP).
  • Controlling the Display Scaling of your Virtual Machines (PC):  We've heard your feedback that Hyper-V Virtual Machines sometimes aren't scaled as you'd expect, so we've added a new Zoom option in the View menu, where you can override the default scaling and set it to 100, 125, 150 or 200 – whichever matches your preference. Along the way, we also fixed an issue where certain VMs wouldn't display the remote desktop connection bar after entering full screen mode. We are still refining the experience so there might be some rough edges. For example, although we added zoom levels to handle high DPI more gracefully, when zooming you won't be able to see the VM's whole screen without scrolling.

Improvements for PC

  • fixed an issue for Insiders resulting in the automatic brightness setting unexpectedly being turned off after upgrading. In doing so, we've re-enabled automatic brightness adjust for users that have never changed their auto-brightness setting. If you have already manually configured your auto-brightness setting, then this fix will not affect you. If you would like to enable or disable automatic brightness adjustment, please go to Settings > System > Display, where you can adjust your preferences.
  • fixed an issue Insiders on domain connected PCs may have experienced where login might fail when the computer was disconnected from its domain network.
  • fixed an issue resulting in certain apps, such as Outlook Mail and Calendar, failing to update for some Insiders with the error code 0x800700B7.
  • fixed an issue for Insiders with certain device models where ejecting an SD card might result in a system crash.
  • fixed an issue where disliking one of the Spotlight lock screen images would show the new image immediately, followed by a transition animation from the previous image to the new image.
  • fixed an issue where launching an app from another app while in Tablet mode no longer launched it side by side, and instead launched it fullscreen (for example, when launching a web link from the MSN News app).

Improvements for phone

  • The data usage page in Settings via Settings > Network & wireless > Data usage has been updated with performance and UI improvements.
  • We fixed issues preventing Insiders from adding cards to Wallet and paying using tap to pay.
  • We fixed an issue resulting in being unexpectedly able to close Start in the task switcher.
  • We fixed an issue resulting in certain options for default calling app via Settings > System > Phone > Default apps from being unexpectedly missing.
  • We fixed an issue causing apps that play media in the background, such as Groove Music, to stop when Battery Saver turns on.
  • We fixed an issue Insiders may have experienced where the phone would get into a state where copy/paste wouldn't work until the device had been restarted.
  • We fixed an issue where Settings might hang after unchecking "Let apps automatically use this VPN connection" in VPN Settings.