Windows 10 KB5005101 Cumulative Update released with 34 fixes

Microsoft has released the optional KB5005101 Preview cumulative update for Windows 10 2004, Windows 10 20H2, and Windows 10 21H1 with fixes for thirty-four issues.

This preview update is part of Microsoft's June 2021 monthly "C" update, allowing Windows 10 users to test the upcoming fixes and changes to be released on September 14th as part of Patch Tuesday.

Unlike updates released on Patch Tuesday, this preview update is optional and only contains bug fixes, performance enhancements, and improvements. It does not include any security updates.

You can install this update by going to Settings > Windows Update and clicking on 'Check for Updates.' As this is an optional update, you will need to click on the 'Download and install' link for the update to be installed, as shown below.

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Windows 10 users can also manually download and install the KB5005101 preview update from the Microsoft Update Catalog.

Bluetooth and USB headphone issues fixed

This update tests two fixes for issues Windows 10 users have been experiencing with Bluetooth and USB headphones.

"Addresses an issue that prevents USB audio headsets from working on devices that support USB audio offload. This issue occurs if you installed third-party audio drivers on the devices," explained Microsoft in the KB5005101 support bulletin.

"Addresses a rare condition that prevents Bluetooth headsets from connecting using the Advanced Audio Distribution Profile (A2DP) for music playback and causes the headsets to only work for voice calls."

These issues do not appear to be common, but will likely be eagerly awaited fixes with many people working remotely.

What's new in the Windows 10 KB5005101 update

After installing the KB5005101 update, Windows 10 2004 will have its build number changed to 19041.1202, Windows 10 20H2 to build 19042.1202, and Windows 10 21H1 to build 19042.1202.

The Windows 10 KB5005101 cumulative update preview includes 34 improvements or fixes, with the ten highlighted changes listed below:

Updates a rare condition that causes Bluetooth headsets to only work for voice calls.

Updates an issue that provides the wrong Furigana result when you cancel the Japanese reconversion.

Updates an issue that resets syncing for Microsoft OneDrive to “Known folders only” after you install a Windows update.

Updates an issue that prevents audio headsets that connect to a device using USB from working if the device has certain third-party audio drivers.

Updates an issue with resizing images that might produce flickering and residual line artifacts.

Updates an issue that prevents you from typing any words in the username box during the out-of-box experience (OOBE) process. This issue occurs when you use the Chinese Input Method Editor (IME).

Updates an issue with copying and pasting a text box into Office 365 apps. If you use an IME, you won’t be able to insert text into the text box.

Updates an issue that might cause your device to stop working when making a touch input gesture. This issue occurs if you bring more fingers into contact with the touchpad or screen during the middle of the gesture.

Updates an issue that might cause an external monitor to display a black screen after Hibernation. This issue might occur when the external monitor connects to a docking station using a certain hardware interface.

Updates an issue that resets the brightness for standard dynamic range (SDR) content on high-dynamic range (HDR) monitors. This occurs after you restart your device or reconnect to the device remotely. 

With this release, there are three known issues with KB5005101:

Using the Microsoft Japanese Input Method Editor (IME) to enter Kanji characters in an app that automatically allows the input of Furigana characters, you might not get the correct Furigana characters.  Devices with Windows installations created from custom offline media or custom ISO image might have Microsoft Edge Legacy removed by this update, but not automatically replaced by the new Microsoft Edge. After installing the June 21, 2021 (KB5003690) update, some devices cannot install new updates, such as the July 6, 2021 (KB5004945) or later updates. You will receive the error message, "PSFX_E_MATCHING_BINARY_MISSING".

You can find a complete list of improves and fixes and detailed explanations of the known issues in the KB5005101 support bulletin.