Microsoft fixes stuck temporary file cleaning and other bugs in Windows 11 build 27943

It is time for Windows Insiders to download a new Windows 11 preview build from the Canary Channel. Build 27943 is now rolling out with a bunch of important fixes and improvements, such as stuck temporary file scanning, taskbar bugs, HDR issues, and other problems.

Here is the changelog:

[General]
- This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.
- Fixed the issue causing Settings > System > Storage > Temporary files to get stuck when scanning files. This issue also caused the entry to clean up previous Windows Installations to not show in Storage Settings.
[Taskbar]
- Fixed an issue where if you minimized an app and switched back and forth between desktops, you might end up seeing a duplicate preview thumbnail when hovering over the app in the taskbar.
[Display and Graphics]
- Fixed an issue which could result in HDR unexpectedly turning off immediately after you enabled it in Settings.
[Other]
- Fixed an issue causing an event saying “The “Microsoft Pluton Cryptographic Provider” provider was not loaded because initialization failed” with error 57 to appear in Event Viewer for some Insiders after boot.
- Fixed an issue where if you had to enter a PIN for your device to cast from Quick Settings, pressing Enter wouldn’t confirm the PIN.
- Made another fix to help with Group Policy Editor having unexpected large blank areas and not rendering correctly with the Chinese display language.

The list of known bugs includes the following:

[General]
- [IMPORTANT]Some Windows Insiders may experience a rollback attempting to install this build with either an 0xC1900101-0x20017 error or 0xC1900101-0x30017 error. Unfortunately retrying to install the build will result in another rollback. We are working on a fix.
- [NEW] We’re working on the fix for an issue causing some Insiders with Arm64 PCs to experience an increase in bugchecks (green screens) with error IRQL_NOT_LESS_OR_EQUAL in the latest Canary builds.
[For developers]
- PIX on Windows is unable to play back GPU captures on this OS version. This will be addressed by a new PIX release, estimated to arrive by the end of September. In the meantime, if you are impacted, you can use the “Send Feedback” button in PIX or contact us on the DirectX Discord server and we can help provide private builds.
[Graphics]
- We’re investigating an issue which is causing some Insiders to experience screen flickers when using the browser (and potentially other scenarios) in the latest Canary builds.
[Audio]
- Some Windows Insiders in the Canary Channel are experiencing an issue where audio stops working and Device Manager shows one or more devices with a yellow exclamation mark, including “ACPI Audio Compositor” and others. Selecting Properties on these devices will show “Windows cannot load the device driver for this hardware. The driver may be corrupted or missing.” If you are impacted by this issue, you can follow these instructions to get back into a working state:
  - Right-click on the device with a yellow exclamation mark in Device Manager and select “Update driver”.
  - Choose “Browse my computer for drivers” and then “Let me pick from a list of available drivers on my computer”.
  - Select the driver from the list with the most recent date and click “Next”. If you are presented with a list of common hardware types instead of one or more specific drivers, this device is not related to this issue.
  - This device should be repaired and no longer show a yellow exclamation mark in Device Manager. If it continues to show a yellow exclamation mark, the yellow exclamation mark is not related to this issue.
  - Repeat these steps for each device with a yellow exclamation mark.

You can find the announcement post here.

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