Windows 10 Preview build 14388 now available for Insiders on the Fast ring

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Just like Dona Sarkar announced a few days ago, Microsoft released a new build for Windows 10 Preview and Windows 10 Mobile Insider Preview, the second one this week. The release is dubbed as build 14388, and is available to all insiders on the Fast ring.

As usual, build 14388 doesn’t bring any new features, but is mainly focused on system improvements and bug fixes. As mentioned in Microsoft’s official build announcement post, build 14388 brings 44 improvements to the system. Most notable additions are improved battery life, and enhanced system reliability. Here’s exactly what Microsoft changed in this build:

Improvements and fixes for PC

  • We have updated the Store to version 11606.1001.39 with bug fixes.
  • We fixed an issue where Narrator keyboard shortcuts would not work after locking your PC and then logging back in and going to your desktop.
  • We fixed an issue where Narrator would not read the date and time under Settings > Time & language > Date & time.
  • We fixed a TPM driver crash that could result in the device bug-checking (bluescreen) and rebooting.

Improvements and fixes for Mobile

  • We have updated the Store to version 11606.1001.39 with bug fixes.
  • We fixed the issue causing the keyboard to not show up consistently for InPrivate mode on Microsoft Edge.
  • We fixed an issue that could result in an app getting into a state after being suspended where it would be unable to launch until rebooting the device.”

Of course, the build also brought some issues of its own on both Windows 10 and Windows 10 Mobile. Microsoft listed just some of them, under ‘known issues,’ but we’re sure that the build actually causes more problems to insiders who install it. So, just like we always do, we’re going to write a report article featuring all problems reported by actual users, in order to let you know what to expect from build Windows 10 Preview build 14388. Here’s the list of ‘known issues,’ revealed by Microsoft:

Known issues for PC

  • A recent fix went into place for the Hyper-V firmware that will that affect the ability to boot Windows Server 2016 Tech Preview 5 VMs with Secure Boot enabled. A fix for TP5 builds has been developed however, due to release schedules, the Insider Preview build changes will be released before the TP5 fix is released. During that time, if you try to boot a new TP5 VM with Secure Boot enabled, it will fail. The workaround is to disable Secure Boot during this period.
  • After you install this build on a PC using a non-EN-US language, you may get error code 0x80004005 when enabling Developer Mode on the “For Developers” Settings Page. Even after seeing this error message, your machine is in developer mode and you should still be able to use Visual Studio to develop Universal Windows Applications. In most cases, this error indicates that extra components required by the operating system to enable additional debugging features in Visual Studio or the Windows Device Portal could not be installed automatically.” Check out Microsoft’s blog post for the solution for this issue.

Known issues for Mobile

  • Voice Recorder does not show up consistently as an option for Call Recording. We heard your feedback and plan to release a Voice Recorder app update via the Store soon that has the fix for this issue.
  • Wallet users are prompted for a PIN twice when using tap to pay from a locked phone. You can enter their PIN twice and tap as usual once the phone is unlocked.
  • REMINDER: We have changed the backup format for Windows 10 Mobile devices to reduce the size of the backup stored in OneDrive. As a result, if you do a backup on a device running the latest Windows 10 Mobile Insider Preview builds and move back to the released version of Windows 10 Mobile (Build 10586) and restore from your backup – your Start screen layout won’t restore and remain the default Start layout. Your previous backup also gets overwritten. If you need to go back to Build 10586 temporarily, once you are on Build 10586 you should disable backup so it doesn’t overwrite the good backup from Windows 10 Mobile Insider Preview builds.”

In case you already encountered some issues upon installing Windows 10 Preview build 14388 on your PC or Mobile device, don’t hesitate to let us know about it, in the comments, so we can include your report in our article.


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