A couple of days ago, when Gabe Aul tweeted that they will be doing something they haven't done before with new builds, many speculated what this meant.
I speculated this could mean that we could see an RTM release for Windows 10 Mobile or we could get to see both PC and Mobile builds rolled out on the same day. The latter was the case as Microsoft pushed out a new Mobile Build 10581 to Windows Insiders on the fast ring and then later in the day, pushed out the Build 10576 for Windows 10 PCs (also for Insiders on the fast ring).
So you could say it was a day of double fun!
First of, the Windows 10 Mobile Build 10581 which brings a lot of bug fixes, stability and performance enhancements but most notably if you own a Lumia 1520 or 930, the voice activated "Hey Cortana" feature is now back! Battery life has been improved, visual voicemail now works among other new stuff.
Here is a full Changelog (including known issues) for this latest Build 10576:
Here are some things we have fixed:
- For devices upgraded from Windows Phone 8.1 like the Lumia 930, Lumia Icon, and Lumia 1520 that had the “Hey Cortana” feature – with this build “Hey Cortana” should work again in Windows 10. To make sure it’s turned on, just go to Settings > Extras > Hey Cortana.
- You can now select photos for sharing through third party apps like Facebook, Facebook Messenger, Instagram Beta, WhatsApp etc.
- Battery life should be improved in this build. We fixed several bugs impacting battery life.
- We fixed an issue where you couldn’t choose some apps to show quick status on the Lock screen via Settings > Personalization > Lock screen.
- We’ve made improvements to text prediction and auto-correction.
- Video recording functionality has been improved.
- Visual Voicemail sync should now work properly.
- We fixed the dual-SIM issues that appeared in Build 10572.
- We fixed the issue found with Build 10572 where the Chinese Pinyin QWERTY keyboard stopped working after upgrading from Windows Phone 8.1 that our Chinese Windows Insiders reported.
- As with previous builds, after applying this update the device may appear at a black screen for about 5 minutes when transition between the spinning gears and the final stages of update. Just be patient and it should progress past it. Exact time will vary by device.
- You will be unable to set your default save locations via Settings > System > Storage and will not correctly reflect the current storage settings. If you are using a SD card in your phone, it will show up as a garbled name in Storage settings. Whatever you had configured for your save locations in the previous build will be the same.
- After moving some apps to a SD card, those apps might crash. The workaround is to reboot your phone and those apps should work fine thereafter.
- Deploying Silverlight apps through Visual Studio to your phone won’t work in this build. You can deploy UWP apps to your phone without any issues.
- If you restore a backup from a phone that had a different resolution, you may end up with a corrupted Start experience. The workaround is to go to Action Center (which won’t be corrupted) then Settings > Personalization > Start and apply a different background picture.
Later in the day, Microsoft rolled out a new Build 10576, this time for Windows 10 PC.
Here are the changes, new features and known issues:
- Media casting feature now available in Edge browser
- Ask Cortana now available in PDF files
- Updated Xbox beta app for Windows 10.
Here are some things we have fixed:
- We fixed the issue where the Xbox app for Windows 10 would consume gigabytes of memory on your PC if you have any Win32 games (non -Windows Store games) installed on your PC that have been identified as games or added by you in the Xbox app.
- We introduced an early preview of nested virtualization so that people could run Hyper-V Containers in Hyper-V virtual machines with Build 10565. This build includes performance improvements.
- We’ve been addressing a lot of feedback around localization text UI in various languages and you’ll see a lot of that work in this build.
- The search box should now work in this build if you are in a locale where Cortana is not available.
- To continue receiving missed call notifications and send texts from Cortana, you will need to be on this build and higher. We’ve made a change that improves this experience that requires newer builds.
- When notifications pop up from Action Center, any audio playing (like music from Groove, or videos from the Movies & TV app) gets reduced by 75% for a period of time.
- After upgrading to this build, all your Skype messages and contacts are gone in the Messaging app. The workaround for this is to navigate to this folder in File Explorer:
- Delete or rename the “PrivateTransportId” file.
- Then restart the Messaging app.
- Small form-factor devices, like the Dell Venue 8 Pro, that boot with rotation or virtual mode screen size set larger than the physical screen size will experience a bluescreen on upgrade and will roll back to the previous build.
- After upgrading to this build, the power button on your Surface Pro 3 may no longer put your Surface Pro 3 to sleep and instead shut down.
- WebM and VP9 have been temporarily removed from builds. We continue to develop a VP9 implementation that we intend to ship in Windows. Expect VP9 to return soon in a future build.
So there you have it, a new build each for the Windows 10 Mobile OS and the Windows 10 OS.
Of course, remember to check back here for a demo video on these latest builds.
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Source (Build 10576 for PCs): http://blogs.windows.com/windowsexperience/2015/10/29/announcing-windows-10-insider-preview-build-10576/
Source (Build 10581 for Windows 10 Mobile):