The September 2021 hotfix update is released, and Microsoft is rolling out new cumulative updates KB5005565 and KB5005566 for recent versions of Windows 10.
Today’s cumulative updates include security fixes for PCs with the May 2021 update (version 21H1), the October 2020 update (version 20H2), and the May update. 2020 (2004 version).
The update is now being rolled out through Windows Update, WSUS, and the Microsoft Update Catalog with many bug fixes and performance improvements.
The full list of today’s cumulative updates is below:
Like every Patch Tuesday, you can find and install new updates by going to Settings, clicking on Windows Update, and selecting ‘Check for updates‘to install the updates.
If you have multiple PCs or want to fix PCs manually, you can learn more about how to do it here.
Today’s Patch Tuesday updates also fix 60 security vulnerabilities, including a zero-day MSHTML Windows vulnerability tracked as CVE-2021-40444.
What’s new in cumulative update KB5005565
With update KB5005565, Microsoft fixed a bug that caused Bluetooth headsets to only work for voice calls and another bug that provided the wrong Furigana result when undoing Japanese downgrade.
The company also updated an issue that resets sync for Microsoft OneDrive to “known folders only” after you install a Windows update.
After installing this update, Windows 10 2004 will be updated to create 19041.1237, Windows 10 20H2 will be updated to create 19042.1237, and Windows 10 21H1 will be updated to create 19043.1237.
This cumulative update ships with the following highlighted fixes:
Addresses an issue that causes PowerShell to create an infinite number of child directories. This problem occurs when you are using PowerShell Move-element command to move a directory to one of its children. As a result, the volume fills up and the system stops responding.
Updates a rare condition that causes Bluetooth headsets to only work for voice calls.
Updates an issue that provides the wrong Furigana result when undoing Japanese retooling.
Updates an issue that resets sync for Microsoft OneDrive to “known folders only” after you install a Windows update.
Updates an issue that prevents headsets that connect to a device over USB from working if the device has certain third-party audio drivers.
Updates an image resizing issue that may produce flicker and residual line artifacts.
Updates an issue that prevents you from entering words in the username box during the Out of Box Experience (OOBE) process. This problem occurs when you use the Chinese Input Method Editor (IME).
Updates an issue with copying and pasting a text box in Office 365 apps. If you’re using an IME, you won’t be able to insert text into the text box.
Updates an issue that could prevent your device from working during a touch input gesture. This issue occurs if you put more fingers in contact with the touchpad or the screen in the middle of the gesture.
Updates an issue that may cause a black screen to display on an external monitor after hibernation. This problem can occur when the external monitor connects to a docking station using a certain hardware interface.
Updates an issue that resets the brightness of standard dynamic range (SDR) content on high dynamic range (HDR) monitors. This happens after restarting your device or reconnecting to the device remotely.
Windows 10 version 1909 gets KB5005566 with identical fixes.