Microsoft has released a list of what's been fixed in the Windows 10 PC 14271 preview build for Insider members in the Fast ring, along with a list of known issues as well.

Here's the list of the fixed bugs in the build:

  • We fixed an issue where the window borders on apps would change from accent color to black after every upgrade to a new build.
  • We have updated the music control icons that are shown in taskbar previews in music apps like Groove to look more crisp and clean at higher resolutions.
  • We fixed an issue where the taskbar would sometimes not auto-hide and show unexpectedly on top of full screen windows such as showing above a PowerPoint presentation when in slideshow mode.
  • We fixed an issue where the "Hide notifications while presenting" setting preference is lost after upgrading to a new build.
  • The entire app header in Action Center is now right-clickable instead of just the app name or "x".
  • We made it easier to dismiss all notifications from a specific app in Action Center by increasing the target area to encompass the entire app header.
  • We fixed an issue where interaction notifications would not show a button to input text in some cases.
  • Fast user switching should work now with Picture Password.
  • We fixed an issue where some desktop (Win32) apps look missing from Start.
  • We fixed an issue where the accent color does not automatically change when the slideshow option is chosen for your desktop background.

Here's the list of the current known issues:

  • We are tracking an issue reported by Insiders where some PCs will freeze or bluescreen when resuming from hibernation. Disabling hibernation is a workaround in some cases until this is fixed.
  • If you have Kaspersky Anti-Virus, Internet Security, or the Kaspersky Total Security Suite installed on your PC there is a known driver bug that prevents these programs from working as expected in builds from the Development Branch. We are partnering with Kaspersky to fix this issue for a future release, but at this time there are no known workarounds. While this issue is present, we recommend using Windows Defender or another third party anti-virus product of your choice to remain protected.
  • Turning on the "always show all icons in the notification area" setting disrupts the layout of the notification area ("systray").
  • When browsing in Microsoft Edge, charts displayed using D3.js library will not display correctly – e.g. render as black, positioned incorrectly. Known affected sites are Cortana,, and

Source: Microsoft