Windows 11, version 21H2 known issues and notifications

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Find information on known issues and the status of the Windows 11, version 21H2 rollout. For immediate help with Windows update issues, use the Get Help app in Windows or go to support.microsoft.com. Follow @WindowsUpdate on X (formerly Twitter) for Windows release health updates.

Current status as of August 31, 2023

On October 10, 2023, Home and Pro editions of Windows 11, version 21H2 will reach end of servicing. The upcoming October 2023 security update, to be released on October 10, 2023, will be the last update available for this version. After this date, devices running this version will no longer receive monthly security and preview updates containing protections from the latest security threats. Enterprise, Education, IoT Enterprise, and Enterprise multi-session editions for this version will reach end of servicing on October 8, 2024 and will receive security updates until then.

To help keep you protected and productive, Windows Update will automatically initiate a feature update for Windows 11 consumer devices and non-managed business devices that are at, or within several months of reaching, end of servicing. This keeps your device supported and receiving monthly updates that are critical to security and ecosystem health. For these devices, you will be able to choose a convenient time for your device to restart and complete the update.

As always, we recommend that you update your devices to the latest version of Windows 11. For detailed information, see the Windows 11, version 21H2 end of servicing (Home & Pro) lifecycle page. For information about servicing timelines and lifecycle, see Windows 11 release information, Lifecycle FAQ - Windows, and Microsoft Lifecycle Policy search tool.

Known issues

See open issues, issues resolved in the last 30 days, and information on safeguard holds. To find a specific issue, use the search function on your browser (CTRL + F for Microsoft Edge).

SummaryOriginating updateStatusLast updated
Microsoft received reports about an “UNSUPPORTED_PROCESSOR” error
Investigation concluded that the error reported by users was not caused by the August 2023 preview updates.
OS Build 22000.2360
KB5029332
2023-08-22		Resolved External
2023-09-07
16:51 PT
Devices with locale set to Croatia might not utilize the expected currency
This can affect applications which retrieve the device's currency for purchases or other transactions
N/A

Confirmed
2023-02-23
14:24 PT
Compatibility issues with Intel Smart Sound Technology drivers and Windows 11
Windows 11 devices with the affected Intel SST driver might receive an error with a blue screen.
N/A

Mitigated External
2022-09-22
17:52 PT

Issue details

August 2023

Microsoft received reports about an “UNSUPPORTED_PROCESSOR” error

StatusOriginating updateHistory
Resolved ExternalOS Build 22000.2360
KB5029332
2023-08-22		Last updated: 2023-09-07, 16:51 PT
Opened: 2023-08-23, 19:44 PT

Microsoft has received reports of an issue in which users are receiving an “UNSUPPORTED_PROCESSOR” error message on a blue screen after installing updates released on August 22, 2023 ( KB5029332) and then restarting their device. KB5029332 might automatically uninstall to allow Windows to start up as expected. If this occurs, we recommend that you do not attempt to reinstall KB5029332.

Resolution: After investigating these reports, we have found that the “UNSUPPORTED_PROCESSOR” error was not caused by issues in KB5029332 and is limited to a specific subset of processors. For more information on this issue, please see 13th Gen Intel® Core™ Processor Families with Performance Hybrid Architecture Blue Screen Hang Issue with Windows* Preview Updates. This issue will not affect future monthly updates released for Windows. KB5029332 will not be offered to Windows devices that might be affected by this issue and it is recommended that you do not attempt to manually install it on affected devices.

Affected platforms:

  • ​Client: Windows 11, version 22H2; Windows 10, version 22H2; Windows 11, version 21H2
  • ​Server: None

February 2023

Devices with locale set to Croatia might not utilize the expected currency

StatusOriginating updateHistory
ConfirmedN/A

Last updated: 2023-02-23, 14:24 PT
Opened: 2023-02-23, 13:22 PT

The correct default currency might not display or be used in Windows devices which have locale set to Croatia. This can affect applications which retrieve the device's currency for purchases or other transactions. 

Earlier this year, Croatia joined the Eurozone, changing its currency from the Kuna to Euro. Windows Locale data for Croatia will be updated for this change in the short term.

Workaround: Changing the currency in Windows can help. This can be accomplished via the Windows Control Panel.

  1. ​Open the "Windows Region" settings. This can be done in one of the following ways:
    1. ​Open "Control Panel" from the start menu and select "Change date, time, or number formats" under "Clock and Region"
    2. ​On your keyboard, press and hold the Windows key, then press the letter R. This will open the "Run" window. Type INTL.CPL into the Open field,
  2. ​In the Region settings, choose one of the 2 locales for Croatia:
    1. ​Croatian (Bosnia & Herzegovina)
    2. ​Croatian (Croatia)
  3. ​In this same window, click the "Additional settings" button. Once there, click the "Currency" tab.
  4. ​Change the currency symbol from "KN" to Euro, "€"

Additional information can be seen here: Currency formatting - Globalization | Microsoft Learn.

Manually changing currency might also be an option in some applications. Although this won't change the device’s default currency, this could allow usage of the application with the desired currency preference. Some applications might not allow this manual change. Please view the settings and documentation for your applications.

Next steps: We are working on a resolution and will provide an update in an upcoming release.

Affected platforms:

  • ​Client: Windows 11, version 22H2; Windows 10, version 22H2; Windows 11, version 21H2; Windows 10, version 21H2; Windows 10, version 20H2; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019; Windows 10 Enterprise LTSC 2016; Windows 10, version 1607; Windows 10 Enterprise 2015 LTSB
  • ​Server: Windows Server 2022; Windows Server, version 20H2; Windows Server, version 1809; Windows Server 2019; Windows Server 2012 R2; Windows Server 2012; Windows Server 2008 R2 SP1; Windows Server 2008 SP2

November 2021

Compatibility issues with Intel Smart Sound Technology drivers and Windows 11

StatusOriginating updateHistory
Mitigated ExternalN/A

Last updated: 2022-09-22, 17:52 PT
Opened: 2021-11-15, 16:40 PT

Intel and Microsoft have found incompatibility issues with certain versions of drivers for Intel Smart Sound Technology (Intel SST) on Intel 11th Gen Core processors and Windows 11. Windows 11 devices with the affected Intel SST driver might receive an error with a blue screen. The affected driver will be named Intel® Smart Sound Technology (Intel® SST) Audio Controller under System Devices in Device Manager and have the file name IntcAudioBus.sys and a file version of 10.29.0.5152 or 10.30.0.5152. Only devices with both an Intel 11th Gen Core processors and an Intel SST driver version of 10.29.0.5152 or 10.30.0.5152 are affected by this issue.

To safeguard your upgrade experience, we have applied a compatibility hold on devices with affected Intel SST drivers from being offered Windows 11, version 22H2 or Windows 11, version 21H2. If your organization is using Update Compliance, the safeguard IDs are:

  • ​Windows 11, version 21H2: 36899911
  • ​Windows 11, version 22H2: 41291788

Workaround: To mitigate the safeguard, you will need to check with your device manufacturer (OEM) to see if an updated driver is available and install it. This issue is resolved by updating the Intel® Smart Sound Technology drivers to a version 10.30.00.5714 and later or 10.29.00.5714 and later. Important: Later versions refer to just the last part of the version number. For addressing this issue, 10.30.x versions are not newer than 10.29.x versions. Once you have updated to a compatible version of the Intel® Smart Sound Technology drivers, you should be able to upgrade to Windows 11. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before the upgrade to Windows 11 is offered.

Next Steps: If you encounter this safeguard hold and an updated driver is not yet available, you will need to contact your device manufacturer (OEM) for more information.

Note We recommend that you do not attempt to manually upgrade using the Update now button or the Media Creation Tool until this issue has been resolved and the safeguard removed. 

Affected platforms:

  • ​Client: Windows 11, version 22H2; Windows 11, version 21H2

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