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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, click here if you are using a Windows device to open the Get Help app or go to support.microsoft.com. Follow @WindowsUpdate on X (formerly Twitter) for Windows release health updates. If you are an IT administrator and want to programmatically get information from this page, use the Windows Updates API in Microsoft Graph.

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Current status as of October 10, 2023

As of October 10, 2023, Home and Pro editions of Windows 11, version 21H2 have reached end of servicing. The October 2023 security update, released on October 10, 2023, is the last update available for these editions. After this date, devices running these editions 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, content updated 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
Devices might boot into BitLocker recovery with the July 2024 security update
This issue is more likely to affect devices that have the Device Encryption option enabled
OS Build 22000.3079
KB5040431
2024-07-09		Confirmed
2024-07-25
15:50 PT
CrowdStrike issue impacting Windows endpoints causing an error message
CrowdStrike issue impacting Windows endpoints causing an error message on a blue screen.
N/A

Mitigated External
2024-07-25
14:06 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

Resolved
KB5037770		2024-07-23
14:01 PT

Issue details

July 2024

Devices might boot into BitLocker recovery with the July 2024 security update

StatusOriginating updateHistory
ConfirmedOS Build 22000.3079
KB5040431
2024-07-09		Last updated: 2024-07-25, 15:50 PT
Opened: 2024-07-23, 13:57 PT

After installing the July 2024 Windows security update, released July 9, 2024 (KB5040431), you might see a BitLocker recovery screen upon booting your device. This screen does not commonly appear after a Windows update. You are more likely to face this issue if you have the Device Encryption option enabled in Settings under Privacy & Security -> Device encryption. Resulting from this issue, you might be prompted to enter the recovery key from your Microsoft account to unlock your drive.

Workaround:

Your device should proceed to start up normally from the BitLocker recovery screen once the recovery key has been entered. You can retrieve the recovery key by logging into the BitLocker recovery screen portal with your Microsoft account. Detailed steps for finding the recovery key are listed here: Finding your BitLocker recovery key in Windows.

Next steps: We are actively working on a resolution and estimate it will be released in the coming weeks. If you need help with an urgent mitigation for your organization, please contact Support for business.

Affected platforms:

  • ​Client: Windows 11 version 23H2, Windows 11 version 22H2, Windows 11 version 21H2, Windows 10 version 22H2, Windows 10 version 21H2.
  • ​Server: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server 2008.

CrowdStrike issue impacting Windows endpoints causing an error message

StatusOriginating updateHistory
Mitigated ExternalN/A

Last updated: 2024-07-25, 14:06 PT
Opened: 2024-07-19, 07:30 PT

Microsoft has identified an issue impacting Windows endpoints which are running the CrowdStrike Falcon agent, developed by CrowdStrike Holdings. Following updates released and delivered by CrowdStrike on July 18, 2024, devices running the Falcon agent may encounter an error message on a blue screen and experience a continual restarting state.

Affected systems might restart repeatedly and require recovery operations in order to restore normal use.

Updated on July 25, 2024: Microsoft released further guidance on Windows resiliency: Best practices and the path forward. Read more about how we are working in close cooperation to improve resiliency across the Windows ecosystem and explore best practices you can use to support resiliency in your organization.

Updated on July 22, 2024: Microsoft has released a third mitigation option for this issue impacting Windows clients and servers. If devices are unable to recover with the two previous options mentioned below, IT admins can use PXE to remediate. See the revised New Recovery Tool to help with CrowdStrike issue impacting Windows endpoints for detailed instructions on prerequisites and configurations to use PXE Recovery.

Updated on July 21, 2024: As a follow-up to the CrowdStrike Falcon agent issue impacting Windows clients and servers, Microsoft has released an updated recovery tool with two repair options to help IT admins expedite the repair process. Based on customer feedback, this new release includes a new option for recovery using safe boot, the option to generate ISO or USB, a fix for ADK detection when the Windows Driver Kit is installed, and a fix for the USB disk size check. See the revised New Recovery Tool to help with CrowdStrike issue impacting Windows endpoints for detailed instructions on using the signed Microsoft Recovery Tool.

Updated on July 20, 2024: Microsoft has released KB5042426, which contains step-by-step guidance for Windows Servers hosted on-premises that are running the CrowdStrike Falcon agent and encountering a 0x50 or 0x7E error message on a blue screen. We will continue to work with CrowdStrike to provide the most up-to-date information available on this issue. 

A new USB Recovery Tool is available to help IT admins expedite the repair process. The new tool can be found in the Microsoft Download Center. Read more about the new recovery tool and usage instructions at New Recovery Tool to help with CrowdStrike issue impacting Windows endpoints.

Updated on July 19, 2024: A new Knowledge Base article, KB5042421, with additional step-by-step guidance for Windows 11 and Windows 10 clients is now available. We will continue to work with CrowdStrike to provide up-to-date mitigation information as it becomes available.

  

To mitigate this issue ahead of additional resolution options, you can follow these steps:

1. Start Windows into Safe Mode or the Windows Recovery Environment.

2. Navigate to the C:\Windows\System32\drivers\CrowdStrike directory

3. Locate the file matching “C-00000291*.sys”, and delete it.

4. Restart the device.

5. Recovery of systems requires a Bitlocker key in some cases.

For Windows Virtual Machines running on Azure follow the mitigation steps in Azure status.

Additional details from CrowdStrike are available here: Statement on Windows Sensor Update - CrowdStrike Blog.

Affected platforms:

  • ​Client: Windows 11, version 23H2; Windows 11, version 22H2; Windows 11, version 21H2; Windows 10, version 22H2; Windows 10, version 21H2; Windows 10 Enterprise LTSC 2019
  • ​Server: Windows Server 2022; Windows Server 2016; Windows Server 2012 R2; Windows Server 2012; Windows Server 2008 R2 SP1; Windows Server 2008 SP2

February 2023

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

StatusOriginating updateHistory
Resolved KB5037770N/A

Resolved: 2024-05-14, 10:00 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.

Resolution: This issue was resolved in updates released May 14, 2024 (KB5037770) and later. We recommend you install the latest security update for your device as it contains important improvements and issue resolutions, including this one.

Affected platforms:

  • ​Client: Windows 11, version 23H2; 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

Report a problem with Windows updates

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Need help with Windows updates?

Search, browse, or ask a question on the Microsoft Support Community. If you are an IT pro supporting an organization, visit Windows release health on the Microsoft 365 admin center for additional details.

For direct help with your home PC, use the Get Help app in Windows or contact Microsoft Support. Organizations can request immediate support through Support for business.

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