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For Windows, select **Start ▸ Settings ▸ Windows Update ▸ Check for Windows updates**.
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To update the Secure Boot certificates of the computer, restart its regular operating system, Windows or Linux, and apply all available updates.
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Updating the Secure Boot certificates
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Tails has detected that the computer still has outdated Secure Boot certificates and needs an update.
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Since 2023, [[Microsoft has started replacing|https://support.microsoft.com/en-us/topic/windows-secure-boot-certificate-expiration-and-ca-updates-7ff40d33-95dc-4c3c-8725-a9b95457578e]] the Secure Boot certificates originally issued in 2011. These older certificates begin expiring in June 2026.
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[[!wikipedia Secure Boot]] is a security measure that prevents starting malicious operating systems on a computer. Most computers running Windows have Secure Boot enabled. Linux distributions, including Tails, also support Secure Boot.
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Why is this happening?
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After this change in Tails occurs, the computer might display a **Secure Boot Violation** error or another error message when trying to start Tails.
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Otherwise, Tails will no longer start on this computer after a future Tails upgrade. We cannot predict when such an upgrade will occur, because the timing depends on changes that Tails could inherit from Debian in any Tails upgrade.
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[[!img support/known_issues/secure_boot_certificates/secure_boot_update_needed.png class="screenshot" alt="Notification: Secure Boot Update Needed"]]
04/23/2026
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If the **Secure Boot Update Needed** notification below appears when starting Tails, it means that the Secure Boot certificates of this computer need to be updated.
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[[!toc startlevel=2]]
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[[!meta title="Secure Boot certificates update"]]
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Alert triggered
No file mask matches. 04/23/2026
weblate:commit

Changes committed
Changes committed 04/17/2026
cacu

Suggestion accepted
<h1 id="tails" class="step windows linux mac">Welcome to Tails!</h1>
<h1 id="tails" class="step windows linux mac">¡BTe damos la bienvenido/a a Tails!</h1>
04/17/2026
cacu

Suggestion accepted
<p>In the next step, you will make your computer start on this USB stick.</p>
<h2>Hacer <p>En el siguiente paso, harás que latu computadora se inicie en lesta memoria USB.</h2p>
04/17/2026
cacu

Suggestion added
<p>You have installed Tails on your USB stick.</p>
<p>¡Felicitaciones, hHaz instalado Tails en tu memoria USB!</p>
04/17/2026
cacu

Suggestion accepted
<div>
<p class="big">Well done!</p>
<div>
<p class="clone"big">¡Bien hecho!</p>
04/17/2026
anonymous

Suggestion added
[[!meta title="Release notes for the latest version"]]
[[!meta title="Informationen zur neuesten Version"]]
04/17/2026

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