Microsoft is today rolling out two new Windows 10 Insider Preview builds for PC and Mobile for Insiders in the Fast ring today. The builds in question are 16176 for PC, and peculiarly 15204 for Mobile. Microsoft says Windows 10 Mobile builds will be issues from a different branch than that of the PC Insider Program from here on out.

Also, these new builds are available for the following handsets only:

  • HP Elite x3
  • Microsoft Lumia 550
  • Microsoft Lumia 640/640XL
  • Microsoft Lumia 650
  • Microsoft Lumia 950/950 XL
  • Alcatel IDOL 4S
  • Alcatel OneTouch Fierce XL
  • SoftBank 503LV
  • VAIO Phone Biz
  • MouseComputer MADOSMA Q601
  • Trinity NuAns NEO

What's new for PC?

  • Windows Subsystem for Linux Gains Serial Device Support: Windows COM ports can now be accessed directly from a WSL process!
  • You can now hold down the power button on your device for 7 seconds to trigger a bugcheck. This will only work on newer devices that don't uses legacy ACPI power buttons.
  • Narrator will work again on this build.
  • We fixed the issue causing some apps and games to crash due to a misconfiguration of advertising ID that happened in a prior build.
  • We fixed an issue resulting in the Start menu and Action Center having a noticeable framerate drop in their animations on certain devices if transparency was enabled and there were open UWP apps.
  • We fixed an issue from the previous build where the Action Center could get into a state where dismissing one notification unexpectedly dismissed multiple.
  • We fixed an issue where the Clock and Calendar flyout was unexpectedly missing the agenda integration for some Insiders.
  • We fixed an issue from the previous build (Build 16170) resulting in Surface Books unexpectedly doing a disk check after waking from sleep due to it bugchecking during sleep.
  • We fixed an issue from the previous build resulting in Win32 app text sometimes not rendering, for example in File Explorer, until logging out and back in.
  • We fixed an issue where the Extensions Process was suspended inappropriately during Connected Standby, resulting in Microsoft Edge becoming unresponsive on wake if any extensions had been installed.

What's new for Mobile?

  • We have added a new privacy page to the Windows 10 Mobile OOBE experience that allows you to quickly and effectively make common privacy changes while setting up the device. You can read more about our Windows 10 privacy journey here.
  • We fixed the issue where the keyboard would sometimes not appear when a text input field is selected in Microsoft Edge. Known issues for Mobile