Resources:
· Learn about the different types of monthly updates: https://t.co/FeCe6lvId0
· Find resources, tools, and news about known issues and safeguards: https://t.co/UOUYj00OnW
· Have an issue? File feedback to our engineers: https://t.co/Xn0QhLwfwj
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IMPORTANT: Secure Boot certificates used by most Windows devices are started to expire on 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. Learn more by visiting the Secure Boot playbook.
https://t.co/tBnDjMBlgJ
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Highlights for Windows 11, version 25H2:
➡️ The update includes security fixes that are documented in the Security Update Guide. https://t.co/NOIHlMri4P
➡️ This update expands high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout.
➡️ This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.
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Windows 11 release notes:
· Version 26H1 (KB5121000): https://t.co/9XRa5p26Um
· Version 24H2 & 25H2 (KB5121003): https://t.co/jHw2ICPCNx
· Version 23H2 (KB5120240): https://t.co/26OUhBnGe4
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Have questions about how device manufacturers support Secure Boot certificate updates? OEM Secure Boot Office Hours are open today - July 15 - until 7:00 PM PDT. Visit https://t.co/96zPCd6rAd to post your questions for our OEM partners.
Resources:
Learn about the different types of monthly updates: https://t.co/FeCe6lvId0
Find status and known issues for each release: https://t.co/UOUYj00OnW
Have an issue? File feedback to our engineers: https://t.co/Xn0QhLwfwj
(🧵5/5)
@NealCuliner There are more details in the blog below. Essentially these preview updates are released ahead of the planned security update next month which will broadly deploy these features as well as security fixes.
https://t.co/IlC4jzvvkQ
@oldium We really appreciate this feedback. Would you mind filing feedback on this? We can direct this to our engineering teams! https://t.co/D7w9lKX1he