Microsoft has released two new Windows 11 Builds to Beta channel. Insiders in Beta channel are receiving the Windows 11 Build 22621.891 and Build 22623.891 (KB5020040). The Build 22623.891 brings major Task manager improvement in terms of process filtering or process search. It also brings much better theme support for the Task manager.

Coming to details now, the Build 22623.891 has brought the leaked search or process filtering feature in Taks Manager. This, Microsoft mentions was one of the most requested of features. One can filter either using the binary name, PID or publisher name. The Task manager also gets ability to individually chose Light or Dark theme for itself irrespective of the existing Windows theme. Microsoft has also made it easy to apply Efficiency mode via improved dialogue box.

Both Windows 11 Build 22621.891 and Build 22623.891 get ability to back up applicable settings to Microsoft account. It also allows to sync these settings on any Windows device and in Microsoft Office. Here is the full changelog provided for the Build 22621.891 and Build 22623.891 by Microsoft.

Task Manager Improvements 

We have a set of Task Manager improvements rolling out with this build.  

Filter processes: We are bringing process filtering to Task Manager. This is the top feature request from our users to filter/search for processes. You can filter either using the binary name, PID or publisher name. The filter algorithm matches the context keyword with all possible matches and displays them on the current page. The filter is also applied as you switch between pages. You can also use the keyboard shortcut ALT + F to focus on the filter box. This is a helpful feature if you want to single out a process or a group of processes and want to take action or just monitor the performance of the filtered processes. 

The new search box at the top of Task Manager allows you to filter Binary name, PID or Publisher name.

Better theme support: We have added the ability to use your preferred theme in Task Manager regardless of the active theme in Windows. You can set it in the setting page in Task Manager.  

You can set your preferred theme specifically for Task Manager regardless of your chosen Windows theme.

Task Manager now also supports themes for in-app dialogs. All dialog except for “Run new task” and Properties dialog now support themes and will adhere to either app specific theme or Windows theme.   

In-app dialogs such as selecting columns on the Details page will show in the selected theme for Task Manager.

Improved Efficiency mode dialog: We are making it easy for you to apply Efficiency mode and offering the ability to opt-out of the confirmation dialog. You can make changes on the Efficiency mode dialog box by unchecking “Don’t ask me again” or you can enable/disable it the settings for Task Manager. 

You can now opt out of seeing future confirmation dialogs when turning on Efficiency mode.

FEEDBACK: Please file feedback in Feedback Hub (WIN + F) under Desktop Environment > Task Manager. 

Changes and Improvements in Build 22623.891 


  • We have made improvements to Emoji search for Japanese and Simplified Chinese by handling Kana/Kanji and Pinyin properly in the emoji panel. 

Fixes in Build 22623.891 

[Taskbar & System Tray] 

  • When using the bottom right edge gesture to see Quick Settings, the taskbar should no longer get stuck in the expanded state (instead of dismissing to collapsed state). 
  • Fixed an issue causing the do not disturb icon to disappear while in do not disturb mode. 
  • The new show hidden icons flyout’s animation should now be consistent with other taskbar flyouts. 
  • The show hidden icons flyout background color should now align with your accent color if “Show accent color on Start and taskbar” is enabled in Settings > Personalization > Colors. 
  • Fixed multiple explorer.exe crashes impacting taskbar performance. 

Fixes for BOTH Build 22621.891 & Build 22623.891 

  • New! You can back up applicable settings to your Microsoft account. You can also sync these settings on any Windows device and in Microsoft Office. 
  • We fixed an issue that affected File Explorer. It failed to localize folders. 
  • We fixed an issue that affected the CopyFile function. It might have sometimes returned error 317: ERROR_MR_MID_NOT_FOUND.  
  • We fixed an issue that affected process creation. It failed to create security audits for it and other related audit events. 
  • We fixed an issue that affected printing in landscape mode in Microsoft Edge. The print output was incorrect. This issue occurred when you used Microsoft Defender Application Guard. 
  • We fixed an issue that affected Microsoft Defender when it was not the primary antivirus. Microsoft Defender failed to turn off passive mode. This issue occurred when you turn off Smart App Control (SAC). 
  • We added .wcx to the list of Dangerous Extensions that some app control policies do not allow. 
  • We fixed an issue that affected a computer account. Use of non-standard characters can stop the cleanup of the Out of Box Experience (OOBE) accounts. 
  • We fixed an issue that affected the Windows Firewall service. It did not start when you turned on the Override block rules option.  
  • We fixed an issue that might have affected applications that run on the Windows Lock Down Policy (WLDP). They might have stopped working.