August 12, 2025—KB5064010: Hotpatch for Windows 11 Enterprise LTSC 2024 (OS Build 26100.4851)
Applies To
Release Date:
8/12/2025
Version:
OS Build 26100.4851
Windows Secure Boot certificate expirationImportant: 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.
To learn more about Windows update terminology, see types of Windows updates and monthly quality update types. For an overview, see the update history page for Windows 11, version 24H2.
Stay informed! Follow @WindowsUpdate for the latest updates from the Windows Release health dashboard.
Improvements and fixes
The security update includes quality improvements. The following summary outlines key issues addressed by the KB update after you install it.
-
This update makes miscellaneous security improvements to internal OS functionality. There are no additional issues documented in this release.
If you installed earlier updates, your device downloads and installs only the new updates contained in this package.
How to get this update
Before you install this update
Microsoft combines the latest servicing stack update (SSU) for your operating system with the hotpatch update. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
If you are using Windows Update, the latest SSU installs with this update.
Install this update
To install this update, use one of the following Windows and Microsoft release channels.
|
Release Channels |
Available |
Next step |
|
Windows Update |
|
This update downloads and installs automatically from Windows update and Microsoft Update |
|
Catalog |
|
See the other options. |
|
Server Update Services |
|
See the other options. |
File information
For a list of the files provided in this update, download the file information for cumulative update 5064010.
For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5065381) - version 26100.4933.
Note: Hotpatching is now generally available for Windows 11, version 24H2 (Arm64) devices. To get started, check the prerequisites, disable Compiled Hybrid PE (CHPE), and enroll the devices in a quality update policy with hotpatching enabled. For more information, see prerequisites.
Improvements and fixes
The security update includes quality improvements. The following summary outlines key issues addressed by the KB update after you install it.
-
This update makes miscellaneous security improvements to internal OS functionality. There are no additional issues documented in this release.
If you installed earlier updates, your device downloads and installs only the new updates contained in this package.
How to get this update
Before you install this update
Microsoft combines the latest servicing stack update (SSU) for your operating system with the hotpatch update. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
If you are using Windows Update, the latest SSU installs with this update.
Make sure your device meets the following requirements to use Hotpatch updates:
-
Windows 11 Enterprise, version 24H2 (Build 26100.4929 or later), with the current baseline update installed.
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Microsoft Intune with a Hotpatch-enabled Windows quality update policy (see “Enroll Arm64 devices to receive Hotpatch updates").
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An eligible license: Windows 11 Enterprise E3 or E5, Microsoft 365 F3, Windows 11 Education A3 or A5, Microsoft 365 Business Premium, or Windows 365 Enterprise.
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Virtualization-based security (VBS) enabled.
For more information, see Hotpatch prerequisites.
One-time setup: Disable CHPE to enable Hotpatch on Arm64
To enable hotpatching on Arm64 devices, you must also disable CHPE. CHPE is a compatibility layer that's not compatible with hotpatch updates.
-
Use the DisableCHPE policy. Apply the following configuration service provider (CSP) setting via Microsoft Intune or Group Policy, then restart the device once. Learn more at System Policy CSP. ./Device/Vendor/MSFT/Policy/Config/Hotpatch/DisableCHPE = 1
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Use registry keys. You can also set the following registry key value to 1, then restart the device once. HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\HotPatchRestrictions = 1
Your Arm64 devices are now hotpatch ready! For more information, see DisableCHPE.
Enroll Arm64 devices to receive Hotpatch updates
To enroll devices to receive Hotpatch updates:
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Go to the Microsoft Intune admin center.
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Navigate to Devices > Windows updates > Quality updates.
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If you're creating a new policy, select Create Windows quality update policy. To edit an existing policy, select it from the list under Name. On the following screen, select Edit next to Settings.
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Next to Automatic update deployment settings, ensure that the option “When available, apply without restarting the device” is set to Allow.
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Assign the policy to your Arm64 device group.
See the full guide at Enroll devices to receive hotpatch updates.
Install this update
To install this update, use one of the following Windows and Microsoft release channels.
|
Release Channels |
Available |
Next step |
|
Windows Update |
|
This update downloads and installs automatically from Windows update and Microsoft Update |
|
Catalog |
|
See the other options. |
|
Server Update Services |
|
See the other options. |
File information
For a list of the files provided in this update, download the file information for cumulative update 5064010.
For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5065381) - version 26100.4933.
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