Microsoft Announced Windows 10 Insider Preview Build 17123 for Fast Ring

Microsoft has released Windows 10 Insider Preview Build 17123 (RS4) to Windows Insiders in the Fast ring on March 16, 2018. Here are details about the changes and improvements in the new build including new features.

What is new in Windows 10 Insider Build 17123?

1. High Efficiency Image File Format (HEIF) for Windows 10

Microsoft has released High Efficiency Image File Format (HEIF) for Windows 10 and the Photos app! HEIF is an image container that uses modern codecs like HEVC to enhance quality, compression, and capabilities as compared to previously existing formats like JPEG, GIF, and PNG. Additionally, HEIF supports encoding image sequences, image collections, auxiliary images like alpha or depth maps, live images & video, audio, and HDR for improved and greater contrast. Based on your feedback that these features and the ability to share photos easily with other platforms is important to you, Microsoft decided to work on HEIF. In this release you can only view HEIF images as Microsoft provided only viewing support (You cannot edit HEIF images in this release).

To give it a try, you will have to join the Windows App Preview Program for the Photos app and make sure you are running the March release of the  Photos app (Version 2018.18022.13740.0 or newer). This and later versions of the Photos app have been updated for RS4 to support viewing the primary image inside a HEIF file and to guide the installation of dependencies like the HEIF and HEVC media extensions from the Microsoft Store. Once installed, these media extensions enable HEIF viewing in Photos as well as thumbnails and metadata in File Explorer.

Apart from these, any application that uses WICWinRT Imaging APIs, or the XAML Image control can now add similar support for viewing single HEIF images.

You can go to Feedback Hub to send feedback to Microsoft on the HEIF experience with the Photos app and Windows 10.

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2. Updates in Windows Mixed Reality

With this new build, there as some known issues with Windows Mixed Reality that you should know about. Read these if you are going to try Windows Mixed Reality features:

  • Microsoft is still investigating reports of a performance regression for Windows Mixed Reality on hybrid laptops on this build.
  • In some cases, the inbox apps may fail to load inside of Windows Mixed Reality and newly placed Holograms may be empty. Both of these issues can be resolved by restarting Windows Mixed Reality
  • Sometimes, there may be a long delay and restart of mixed reality when transitioning to a new place (Skyloft or Cliff House).

Here is list of fixed bugs that were present in previous build:

  • The ambient sound in Skyloft should now play with the correct volume.
  • App crash issues solved while launching the Store from Movies & TV app.
  • 360 videos render problem solved, they should render correctly inside of the Edge app, and the 360 Viewer can be launched directly from the Store app.

You can give feedback on Windows Mixed Reality in Feedback Hub.

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General changes, improvements, and fixes for PC

  • Microsoft fixed an issue from the last flight on PCs with the Dolby Access app installed and expired Dolby Atmos license, where the Windows Audio service (audiosrv) would crash with a stack overflow exception and the PC won’t have sound.
  • Also fixed an issue resulting in a bug check with the error message SECURE_KERNEL_ERROR in recent flights.
  • As of Build 17063, a change was made that may have caused some older drivers to not load properly. This may have caused update failures or bugchecks (GSODs) shortly after the PC was rebooted. This build includes fixes for this that should prevent these update failures and bugchecks from occurring.
  • If you clean install, reset your PC, or upgrade straight to this build from the Fall Creators Update, Embedded Handwriting Panel will be turned off by default. The setting will remain on for Insiders who have upgraded from previous builds where it was enabled, and can be turned on by anyone with a pen capable device via the “Write directly into text field” option under Pen & Windows Ink Settings.

Known issues with this build

  • If you had linked your phone to your PC before upgrading, it will become unlinked after upgrading. You will have to relink your phone from Settings > Phone.
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About Aslam Khan

Hi there, I am a blogger, engineer and a computer geek. I love kittens. I spend some of my time blogging besides full time job as Senior Windows Administrator. I like to learn new things.

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