Microsoft releases build 10576 of Windows 10 for PC, with news in Edge and the Xbox app.
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As promised in the morning, today has become the first time that Microsoft launches new builds of Windows 10 for PCs and mobiles in the same day. The new build for mobiles has been available for a few hours, whose news focuses on improving performance and battery life, so now it’s the turn of the new build of Windows 10 for PCs.
This is build number 10576, and unlike the mobile build, this it does contain several new features compared to the previous version (plus the ever-present performance improvements and bug fixes). Let’s take a look at the new features in this build for PCs.

Media streaming from Microsoft Edge
Microsoft Edge now allows transmit video, images and audio to any device compatible with Miracast and DLNA.
To do this, simply open a web page with media content (for example, YouTube, Facebook albums, streaming music from Spotify), press the “…” button in the upper right corner, and then choose the “Cast” option. media to device” and select the device to which we want to transmit.

The only limitation is that unable to stream protected contentlike Netflix streaming.
“Ask Cortana” now works inside PDF documents
The “ask Cortana” functionality has been available in Edge since the launch of Windows 10 (here we explain in detail how it works), but starting with build 10576 we can use it too in PDF documents viewed within Edge.

Xbox beta for Windows 10 is updated
Microsoft is launching a beta version of the Xbox app for Windows 10 for anyone who wants to try out new features without finishing them before they’re available in the “stable” app.
Among the novelties offered by this application in its current state is the possibility of finding friends on Xbox Live from Facebook, being able to record our voice along with the videos of video games, and the possibility of buying Xbox One games directly from the Windows app 10.

Problems that have been fixed in this build
- Resolved a memory leak that caused the Xbox app to consume several GB of RAM when adding Win32 games to the games list (Win32 games are games that are not installed through the Windows Store, such as Portal, Age of Empires, LOL, etc).
- Performance improvements are applied to the Hyper-V nested virtualization system that was introduced in build 10565.
- The display of text in other languages in the Windows interface is improved.
- Now the Windows search box should work without problems, even if we are in a location where Cortana is not available.
Known issues
- Cortana’s missed call notifications and SMS sending no longer work with the previous build, so updating to this build will be required to use these features.
- When a notification of any kind appears, the audio that is playing in the background will be reduced in volume by 75% for a moment.
- After upgrading to this build, Skype messages and contacts will be gone from the messaging app. To fix this we can go to C:UsersusernameAppDataLocalPackagesMicrosoft.Messaging_8wekyb3d8bbweLocalCache and delete or rename the “PrivateTransportId” file, and then restart the messaging app.
- Small tablets whose primary orientation is portrait (such as the HP Stream 7 or Dell Venue 8 Pro) will display a blue screen when updating to this build, and will revert to the previous build.
- It may happen that when installing this build on the Surface Pro 3, the power button changes its behavior and turns off the computer instead of putting it to sleep.
- Support for WebM and VP9 has been temporarily disabled in Microsoft Edge, but will return in future builds.
If you have questions about how to install this build of Windows 10, you can follow the instructions in this article.