Microsoft releases Build 20241 and the interface with applications that adapt to Windows themes is improved

Yesterday we saw how Microsoft released the fall update of Windows 10, the October 2020 Update and now we return to the routine that surrounds the Redmond company with the launch of a new Build within the Insider Program for those who are part of the Dev Channel.

It’s about the Build 20241, a compilation that presents some interesting improvements that should be taken into account since it is almost certain that they will later reach stable versions. So we see how this Build allows the theme recognition for different applications improving the integration in the operating system as well as optimizing the defragmentation system.

Theme-aware apps

Presentation screens with theme recognition arrive for Universal Windows Platform applications (UWP) and now when any of the supported applications are launched, the splash screen color will match the default application mode. If we have the light theme activated, we will see a light theme start screen, in the same way that if we have the dark theme activated we will see a dark theme start screen.


This feature is being rolled out to a subset of Insiders in the Dev channel to make it easier to identify issues that can affect performance and reliability. This improvement will be rolled out gradually for everyone in the development channel.

The following applications already support this functionality. And, in the future, new compatible apps will be incorporated through the Microsoft Store:

  • Setting
  • Store
  • Windows security
  • Alarms & Clock
  • Calculator
  • Maps
  • Voice recorder
  • Groove
  • Movies & TV
  • Snip & Sketch
  • Microsoft ToDo
  • Office
  • Feedback Center
  • Microsoft Solitaire Collection

Improving the defragmentation experience

Some changes have been made to the Optimize Drives page (Settings> System> Storage> Optimize drives), including:

  • A new “Advanced View” checkbox is added to list all volumes, including hidden volumes. Keep in mind that they are still putting this up and running. We will see the checkbox in this build, but we may not notice any difference when we click on it.
  • More details are listed in the column “Actual state” when volumes are not available for defragmentation (for example, “Unsupported Partition Type” and “Unsupported File System Type”).
  • Support for pressing F5 to update has been added.

Developer updates

  • The Windows SDK continues to grow at the same rate as the evolutions in the Dev Channel. Whenever a new build of the OS goes through the development pipeline, the corresponding SDK will also be released.

Changes and improvements

  • To help ensure Narrator users are aware of notifications on the screen, if a high priority notification appears while the computer is locked and remains on the screen, now we will also read it when unlocking your PC and not just at arrival time.
  • The Japanese Address and Rinna candidate suggestion services will be removed from the Japanese IME; thanks to the Windows Insiders members who have shared their feedback on them.

Other improvements

  • Fixed an issue that caused some Insiders to experience bugchecks for APC_INDEX_MISMATCH in recent versions.
  • Fixes an issue where scrolling and pinch-to-zoom were not working properly on touch devices like Surface Pro X, Surface Pro 7, and others.
  • Fixed an issue where selecting an IME candidate or hardware keyboard text prediction candidate would sometimes insert the candidate next to the selected one.
  • Fixed an issue where new applications cannot be installed with a Windows Installer service error on x86 systems.
  • Fixes an issue where when attempting to perform a PC reset using the Keep my files option, the error “There was a problem resetting your PC. No changes were made.”
  • Fixed an issue where robocopy was not preserving directory dates when using move command.
  • Fixed a high impact dwm.exe crash in recent releases.
  • Fixes an issue that caused the system information window (msinfo32) to crash on startup.
  • Fixed an issue that caused the System Information window (msinfo32) to unexpectedly have a blank icon on the taskbar.
  • Fixes an issue that could cause Bitlocker encryption will fail with error 0x803100b2.
  • Fixed an issue that caused certain applications to flicker when the Media Controls pop-up was visible on the screen and you moved the mouse.
  • Fixed a Issue causing the screen to flicker on certain devices by accessing the power options on the login screen.
  • Fixed a recent issue where closing a tab in Microsoft Edge while Task Manager was running could cause Task Manager to crash.
  • Fixed an issue that caused some Insiders will see the message “Sorry, something went wrong” when running the workflow to improve Windows Hello Face recognition.
  • Fixed a recent builds issue where if Settings was open when the PC went into hibernation, connected stilus may not reconnect until Bluetooth is turned off and on again.
  • Fixes an issue that could cause Windows Sandbox to display error 0x80070003.
  • Fixed an issue where a non-functional link to Rename your PC was displayed for non-administrator users on the Project to this PC page in Settings.
  • Fixed an issue where activation page in Settings crashed if you were browsing to it recently while not connected to the internet.
  • We fixed an issue in printer and scanner setup where clicking on the Get app button available for some printers, setup was failing recently.
  • Fixed an issue where clicking the Copy button under “View Hardware and Connection Properties” Under Network Settings, I was getting strange lines saying “Automatic proxy detection” on the settings page.
  • The bug that affected certain VPN connections, where clicking the entry in the Network side menu was not doing anything, has been eliminated.
  • S fixes an issue that could cause Windows updates to fail with error 0xc0000005.
  • Addresses an issue that could cause windows.old to be unexpectedly large for some Insiders.
  • Fixed an issue that resulted in the new gesture to control the position of the text cursor using the space bar on the touch keyboard not working for some Insiders.
  • Fixes an issue that could cause Internet Explorer will fail to write certain combinations on websites with Dayi IME.
  • Eliminates a bug where wrong characters were inserted into password fields when typing with the Japanese IME in Kana mode.
  • Fixed an issue where when using the older version of the Japanese IME, if you set the IME to disabled during a compose and then immediately start writing, the underlying application might crash.

Known issues

  • They investigate an issue where new applications will not install with a Windows Installer service error on x86 systems. Windows x64 is not affected.
  • They work on correcting a problem where, when trying to perform a PC reset Using the “Keep my files” option, the error “There was a problem resetting your PC. No changes were made. “
  • We are investigating reports of the update process crashing for extended periods when trying to install a new version.
  • They work on a solution for enable live preview of pinned site tabs.
  • They are working to enable the new taskbar experience for existing pinned sites. In the meantime, you can unpin the site from the taskbar, remove it from the edge: // apps page, and then pin the site again.
  • They investigate reports of some devices experiencing a KMODE_EXCEPTION bugcheck when using certain virtualization technologies.
  • They investigate an issue reported by some Insiders where the taskbar hides the power button on the Start menu. If this is happening on your PC, you may need to use the Windows key plus the X menu to shut down for the time being.
  • They study reports where some devices still experience a DPC_WATCHDOG_VIOLATION bug check after taking build 20236.
  • Investigating reports that some devices are getting a DRIVER_IRQL_NOT_LESS_OR_EQUAL bugcheck in tcpip.sys.
  • They are working on a fix where after taking build 20236, devices running Malwarebytes Web Protection can no longer connect to the network. Users can roll back to 20231 and pause updates or disable Web Protection as a workaround.
  • They study reports from some Insiders who are experiencing APC_INDEX_MISMATCH bug checks.
    We are investigating GPU Compute scenarios, such as using CUDA and DirectML, that do not work within the Windows Subsystem for Linux (WSL).

If you belong to the Dev Channel within the Insider Program, you can download the update by going the usual route, that is, “Settings> Update and Security> Windows Update”.