Windows 10 Insider Preview build 14959: Fixes and known issues for PCs

After announcing details of its upcoming Windows 10 Creators Update last week, Microsoft rolled out its first Insider Preview since that event today. Windows 10 build 14959 is now available for PCs and phones in the Fast ring - but as always, it also includes various fixes, and some known issues to be aware of before installing it on your system.

First, let's take a look at the fixes Microsoft is bringing to PCs today with the new build:

  • We fixed an issue for Insiders resulting in the automatic brightness setting unexpectedly being turned off after upgrading. In doing so, we’ve re-enabled automatic brightness adjust for users that have never changed their auto-brightness setting. If you have already manually configured your auto-brightness setting, then this fix will not affect you. If you would like to enable or disable automatic brightness adjustment, please go to Settings > System > Display, where you can adjust your preferences.
  • We fixed an issue Insiders on domain connected PCs may have experienced where login might fail when the computer was disconnected from its domain network.
  • We fixed an issue resulting in certain apps, such as Outlook Mail and Calendar, failing to update for some Insiders with the error code 0x800700B7.
  • We fixed an issue for Insiders with certain device models where ejecting an SD card might result in a system crash.
  • We fixed an issue where disliking one of the Spotlight lock screen images would show the new image immediately, followed by a transition animation from the previous image to the new image.
  • We fixed an issue where launching an app from another app while in Tablet mode no longer launched it side by side, and instead launched it fullscreen (for example, when launching a web link from the MSN News app).

The list of known issues is pretty short for this build:

  • If you have a 3rd party antivirus product installed on your PC – your PC might not be able to complete the update to this build and roll-back to the previous build.
  • We’re aware of an issue where Internet Explorer may crash a few seconds after launch and working.

If you're not prepared to deal with either of those issues, it might be best to avoid installing build 14959 today. You might also want to consider switching to the Slow or Release Preview rings, where users are guaranteed more stable builds with fewer issues to worry about.

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