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Windows 10 Insider Preview build 10586 for PCs now available on Fast ring

Last week, Microsoft rolled out a new Windows 10 Insider Preview for PCs, build 10576, for those on the Fast ring, including a bunch of new features. Today, it's releasing a new build - but this time, it's focused on "bug fixes and general improvements".

Windows 10 Insider Preview build 10586 is now available on the Fast ring, and Microsoft's Gabe Aul described it as "very fast and smooth" adding that it "makes a great daily driver". A recent rumor claimed that 10586 had been signed off as the 'Fall Update' for Windows 10 (known also as 'Threshold 2' or 'TH2'), but Aul did not refer to this in his blog post today.

In its efforts to improve the user experience and add a bit more polish to the OS, Microsoft has fixed a range of issues in build 10586:

  • The issue where any audio playing (like music from Groove, or videos from the Movies & TV app) gets reduced by 75% for a period of time after a notification pops up from Action Center is fixed.
  • Pressing the power button on your Surface Pro 3 should put your Surface Pro 3 to sleep instead of shutting it down.
  • We fixed an issue reported by Windows Insiders where a disksnapshot.exe command prompt window would flash randomly.
  • Windows should now remember your previous login type. For example, if you log in with a PIN – it will prompt you for a PIN next time instead of another type.
  • We fixed an issue where Tab previews in Microsoft Edge were appearing as black if the page was not scrolled to the top, and web note clippings were also appearing as black.
  • 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 should no longer experience a bluescreen on upgrade.
  • Apps and games should download from the Store more reliably.

But of course, as Windows Insiders will already know, pre-release software is never perfect, and the new build comes with its share of known issues too:

  • After upgrading from one Windows 10 Insider Preview build to another Insider Preview build, Skype messages and contacts will disappear from the Messaging + Skype app. You can get Skype messages and contacts back by navigating to “C:\Users\<username>\AppData\Local\Packages\Microsoft.Messaging_
  • 8wekyb3d8bbwe\LocalCache” in File Explorer and deleting or renaming the “PrivateTransportId” file. After deleting or renaming that file, go to the Skype video app and sign out of Skype and sign back in.
  • The Insider Hub might be gone after upgrading to this build. You can get Insider Hub back by going to Settings > System > Apps & features and clicking “Manage optional features”, choosing “Add a feature” and selecting Insider Hub.

If you upgrade to build 10586 today, be sure to let us know how you get on - and if you encounter any other major issues not documented in Microsoft's release notes.

Update: Microsoft made no reference to 10586 being the TH2 build today, but the signs are pointing that way:

While Microsoft no longer uses the 'RTM' designation, it certainly seems that this is indeed the same build that will be released publicly - i.e. to non-Insiders - as the Windows 10 Fall Update.

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