Windows 10 KB5005611 (21H1) released with major fixes

  • General

KB5005611 is now available for Windows 10 21H1, version 20H2 (October 2020 Update), and version 2004. This update is rolling out via Windows Update and WSUS for business, but Microsoft has also published direct download links for Windows 10 KB5005611 offline installers.

Windows 10 KB5005611 is an optional update, so it won’t download or install unless you manually select the update and click on the “Download and install” option. This patch does not include security fixes, but it does come with a long list of general improvements and bug fixes.

KB5005611 will bump version 21H1 system to Windows 10 Build 19043.1266. On the other hand, version 20H2 (October 2020 Update) will get Windows 10 19042.1266. Similarly, this cumulative preview update will appear as Build 19041.1202 on devices still running Windows 10 version 2004.

Remember that support for Windows 10 version 2004 is ending in December and Microsoft will stop releasing optional updates soon.

On your devices, when you check for updates today, the following update will appear on your screen:

2021-09 Cumulative Update Preview for Windows 10 Version 21H1 for x64-based Systems (KB5005611)

Or

2021-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB5005611)

To download and install Windows 10 Build 19043.1266, use these steps:

  • Visit the Windows Update page via Windows Search or Settings (Updates & Security).
  • Click on “check for updates” and keep checking for updates until you see a new optional patch.
  • Under the optional update, click on the “Download and install” button.
  • Select “restart now” to apply the improvements and fixes.

Download Links for Windows 10 KB5005611

Windows 10 KB5005611 Direct Download Links: 64-bit and 32-bit (x86).

Using the above link, you can find the offline installers on Microsoft Update Catalog. These standalone installers (.msu) files will allow you to install the update without an active internet connection, and the same installer can be used on any device.

However, make sure that you download the .msu file compatible with the edition, version and processor of Windows 10. You can verify the configuration under  Settings > System > About.

Once done, click the Download button to open a new download window with a link to the .msu file. In Chrome, you need to copy and paste the .msu link in another tab. In Microsoft Edge, simply click on the link to start the download.

Windows 10 KB5005611 (Build 19043.1266) Full Changelog

  1. Fixes News and Interests issues.
  2. Fixes issues with Outlook app and add-in.
  3. Fixes an issue that forces News and Interests widget on the taskbar.
  4. Fixes system crashes.
  5. Fixes sound distortion when recording using digital assistants.

With today’s cumulative update, Microsoft has finally fixed an issue that crashes apps like Outlook when browsing emails or calendars synced to the account. Additionally, a bug has been fixed where Outlook add-in could prevent users from typing a reply in other Windows apps.

KB5005611 update

Microsoft is also looking into News and Interests issues. After applying this update, News and interests should no longer appear blurry when you use certain screen resolutions or scaling option.

Additionally, a bug has been fixed where the system clock could display incorrect time when you’ve daylight saving time (DST) change enabled.

Microsoft has also fixed a bug that causes your device to stop working when you restart the system after normal use. Another bug has been fixed where taskbar apps may not work when the taskbar is not pinned to the bottom of the screen (default location).

Additionally, Windows 10 Build 19043.1266 delivers a fix for a bug when sharing protected content using apps like Microsoft Teams. After the update, protected content, such as digital rights management (DRM) media, will appear blank for everyone. Previously, DRM content appeared transparent for some users.

The patch also comes with these bug fixes:

  • Microsoft has fixed an issue where Windows couldn’t remember the state of NumLock after the system reboot.
  • Microsoft has fixed an issue that causes a memory leak in lsass.exe.
  • Microsoft has fixed the Blue Screen of Death errors.

Microsoft is currently not aware of critical issues in the update, but you can always uninstall Windows 10 update using Command Prompt or Settings if you come across a new bug.

For Windows 11, Microsoft has released a separate update with quality improvements and bug fixes.