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Copy file name to clipboardExpand all lines: azure-local/security-update/security-update.md
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The Azure Local product team is aware of the upcoming expiration of the boot certificates of Windows devices and is actively working with solution OEM partners to deliver a managed update. Upcoming solution updates will initiate the mitigation process to address this scenario.
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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## Improvements
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## Windows Secure Boot certificate expiration
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Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see [Windows Secure Boot certificate expiration and CA updates](https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e?preview=true).
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The Azure Local product team is aware of the upcoming expiration of the boot certificates of Windows devices and is actively working with solution OEM partners to deliver a managed update. Upcoming solution updates will initiate the mitigation process to address this scenario.
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To learn more about Windows update terminology, see [types of Windows updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates)and [monthly quality update types](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544).
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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## Improvements
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## Windows Secure Boot certificate expiration
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Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see [Windows Secure Boot certificate expiration and CA updates](https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e?preview=true).
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The Azure Local product team is aware of the upcoming expiration of the boot certificates of Windows devices and is actively working with solution OEM partners to deliver a managed update. Upcoming solution updates will initiate the mitigation process to address this scenario.
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To learn more about Windows update terminology, see [types of Windows updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates)and [monthly quality update types](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544).
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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## Improvements
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This security update contains fixes and quality improvements from [KB5066780](https://support.microsoft.com/en-us/topic/october-14-2025-kb5066780-os-build-25398-1913-fcae5a50-170f-40dd-af68-ea2a267a74e6) (released October 14, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
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This security update contains fixes and quality improvements from [KB5066780](https://support.microsoft.com/topic/october-14-2025-kb5066780-os-build-25398-1913-fcae5a50-170f-40dd-af68-ea2a267a74e6) (released October 14, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
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-**[Input]**
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- Fixed: An issue where some characters didn’t display correctly when using the Chinese Input Method Editor (IME).
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- Fixed: This update addresses an issue where certain Chinese characters appeared as empty boxes in some text fields, such as those used in [Connection Manager Administration Kit](/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/hh831675(v=ws.11)), when a character limit was set.
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-**[Networking (known issue)]** Fixed: This update addresses an issue where you might not be able to connect to shared files and folders if you're using the Server Message Block (SMB) v1 protocol on NetBIOS over TCP/IP NetBIOS ([NetBT](/windows-hardware/customize/desktop/unattend/microsoft-windows-netbt)). This can happen after installing update [KB5065425](https://support.microsoft.com/en-us/topic/september-9-2025-kb5065425-os-build-25398-1849-5cbdf982-3ed6-49bf-a936-457f0edc7056?preview=true).
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-**[Networking (known issue)]** Fixed: This update addresses an issue where you might not be able to connect to shared files and folders if you're using the Server Message Block (SMB) v1 protocol on NetBIOS over TCP/IP NetBIOS ([NetBT](/windows-hardware/customize/desktop/unattend/microsoft-windows-netbt)). This can happen after installing update [KB5065425](https://support.microsoft.com/topic/september-9-2025-kb5065425-os-build-25398-1849-5cbdf982-3ed6-49bf-a936-457f0edc7056?preview=true).
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-**[PowerShell]** Fixed: This update addresses that affects PowerShell Remoting and Windows Remote Management (WinRM). Commands might time out after 10 minutes.
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## Windows Secure Boot certificate expiration
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Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see [Windows Secure Boot certificate expiration and CA updates](https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e?preview=true).
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The Azure Local product team is aware of the upcoming expiration of the boot certificates of Windows devices and is actively working with solution OEM partners to deliver a managed update. Upcoming solution updates will initiate the mitigation process to address this scenario.
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To learn more about Windows update terminology, see [types of Windows updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates)and [monthly quality update types](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544).
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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## Improvements
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This security update contains fixes and quality improvements from [KB5066835](https://support.microsoft.com/en-us/topic/october-14-2025-kb5066835-os-builds-26200-6899-and-26100-6899-1db237d8-9f3b-4218-9515-3e0a32729685) (released October 14, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
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This security update contains fixes and quality improvements from [KB5066835](https://support.microsoft.com/topic/october-14-2025-kb5066835-os-builds-26200-6899-and-26100-6899-1db237d8-9f3b-4218-9515-3e0a32729685) (released October 14, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
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-**[Browser]** Fixed: This update addresses an issue that caused the print preview screen to stop responding in Chromium-based browsers.
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## Windows Secure Boot certificate expiration
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Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see [Windows Secure Boot certificate expiration and CA updates](https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e?preview=true).
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The Azure Local product team is aware of the upcoming expiration of the boot certificates of Windows devices and is actively working with solution OEM partners to deliver a managed update. Upcoming solution updates will initiate the mitigation process to address this scenario.
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To learn more about Windows update terminology, see [types of Windows updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates)and [monthly quality update types](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544).
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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## Improvements
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## Windows Secure Boot certificate expiration
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Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see [Windows Secure Boot certificate expiration and CA updates](https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e?preview=true).
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The Azure Local product team is aware of the upcoming expiration of the boot certificates of Windows devices and is actively working with solution OEM partners to deliver a managed update. Upcoming solution updates will initiate the mitigation process to address this scenario.
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To learn more about Windows update terminology, see [types of Windows updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates)and [monthly quality update types](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544).
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To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see [Windows monthly updates explained](https://techcommunity.microsoft.com/blog/windows-itpro-blog/windows-monthly-updates-explained/3773544). For information on Windows update terminology, see the different types of [Windows software updates](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). For an overview, see the update history page for Azure Stack HCI, version 24H2.
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