Note
- Windows Secure Boot certificate expiration
- Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past months. Devices that haven’t received the newer certificates will continue to start and operate normally, and standard Windows updates will continue to install. We will continue to install the newer certificates via Windows updates in the coming months.
- You can check your PC status on the Windows Security app. If you are an IT administrator, follow the guidance on the Secure Boot Playbook for Windows clients and Windows Server.
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.