Windows 10, version 21H2

Find information on known issues and the status of the Windows 10, 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 June 13, 2023

As of June 13, 2023, Home, Pro, Pro Education and Pro for Workstations editions of Windows 10, version 21H2 have reached end of servicing. The June 2023 security update, released on June 13, 2023, is the last update available for these editions. Devices running these editions will no longer receive monthly security and preview updates containing protections from the latest security threats. Enterprise, Education, and Enterprise multi-session editions for this version will reach end of servicing on June 11, 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 10 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 10 or upgrade eligible devices to Windows 11. For detailed information, see the Windows 10, version 21H2 end of servicing (Home & Pro) lifecycle page. For information about servicing timelines and lifecycle, see Windows 10 release information, Windows 11 release information, Lifecycle FAQ - Windows, and Microsoft Lifecycle Policy search tool.

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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).

Summary	Originating update	Status	Last 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 19044.4651 KB5040427 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 KB5037768	2024-07-23 14:01 PT
Apps show "Open With" dialog when right-clicking on Taskbar or Start menu icons You might experience this when right-clicking an app icon shown in your Taskbar or Start menu to execute a task.	OS Build 19044.4412 KB5037768 2024-05-14	Resolved KB5040427	2024-07-09 10:06 PT
Enterprise customers might be unable to use Microsoft Connected Cache This issue affects Windows devices which use the DHCP Option 235 to configure the Microsoft Connected Cache endpoint	OS Build 19044.4046 KB5034763 2024-02-13	Mitigated	2024-04-05 11:43 PT

Issue details

July 2024

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

Status	Originating update	History
Confirmed	OS Build 19044.4651 KB5040427 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 (KB5040427), 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.

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CrowdStrike issue impacting Windows endpoints causing an error message

Status	Originating update	History
Mitigated External	N/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

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June 2024

Apps show "Open With" dialog when right-clicking on Taskbar or Start menu icons

Status	Originating update	History
Resolved KB5040427	OS Build 19044.4412 KB5037768 2024-05-14	Resolved: 2024-07-09, 10:00 PT Opened: 2024-06-17, 09:45 PT

Following installation of the Windows update released April 23, 2024 (KB5037768)and updates released after that, certain apps might display an "Open With" dialog box asking, "How do you want to open this file?". You might experience this issue when you place your mouse on an app icon shown in your Taskbar or Start menu and right-click on the app to execute a task in that app. Resulting from this, you might see the “Open With” dialog box instead of the execution of the selected task.

This issue was reported by Teams, new Outlook for Windows, and Snip & Sketch users. This issue can also affect other applications attempting to right-click on its icon to find a context menu with a list of tasks.

Workaround: Although the "Open With" dialog prevents the use of the tasks available from the right-click context menu, it's likely that those same operations can be performed by making the application interface visible, and navigating the application interface and menus.

Resolution: This issue was resolved in updates released July 9, 2024 (KB5040427) and later. We recommend you install the latest security update for your device. It contains important improvements and issue resolutions, including this one.

Affected platforms:

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

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April 2024

Enterprise customers might be unable to use Microsoft Connected Cache

Status	Originating update	History
Mitigated	OS Build 19044.4046 KB5034763 2024-02-13	Last updated: 2024-04-05, 11:43 PT Opened: 2024-04-05, 11:09 PT

After installing the February 2024 Windows security update (KB5034763), released February 13, 2024, or later updates, some Windows devices which use the DHCP Option 235 for discovery of Microsoft Connected Cache (MCC) nodes in their network might be unable to use the MCC nodes. Instead, these Windows devices will download updates and apps from the public internet and IT administrators would see increased download traffic on their internet routes.

Home users of Windows are unlikely to experience this issue, as Microsoft Connected Cache configured via DHCP Option 235 is more commonly used in enterprise environments.

Workaround:

1. ​Option1: Configure Microsoft Connected Cache endpoint in DOCacheHost policy as indicated in Cache hostname. Additionally, DOCacheHostSource has to be set to 1 or removed as indicated in Cache hostname source. Note that by default, the DOCacheHost and DOCacheHostSource policies have no value.
2. ​Option2: This issue can also be mitigated using Group Policies available through our support channel. Organizations can request help through Support for business.

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

Affected platforms:

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

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February 2023

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

Status	Originating update	History
Resolved KB5037768	N/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 (KB5037768) 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

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Report a problem with Windows updates

To report an issue to Microsoft at any time, use the Feedback Hub app. To learn more, see Send feedback to Microsoft with the Feedback Hub app.

Need help with Windows updates?

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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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