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Windows 11 now shows if your Secure Boot certificates are ready for June
Winsage
April 24, 2026

Windows 11 now shows if your Secure Boot certificates are ready for June

Windows 11 has introduced a feature that allows users to verify the status of their Secure Boot certificates directly from system settings, simplifying the process ahead of the June 2026 expiration deadline. This update enhances accessibility and empowers users to maintain system security against vulnerabilities. Secure Boot helps prevent unauthorized software and malware from loading during startup, and confirming certificate status can mitigate risks associated with system breaches.
Windows Security App Gains Secure Boot Certificate Status Ahead of Major Certificate Refresh
Winsage
April 2, 2026

Windows Security App Gains Secure Boot Certificate Status Ahead of Major Certificate Refresh

The Secure Boot certificates used by the Unified Extensible Firmware Interface (UEFI) on Windows PCs will expire in late June 2026. Microsoft is rolling out updated certificates through Windows Update to ensure user protection. Starting in April 2026, users can check their device's status in the Windows Security app, which will feature a color-coded badge system: - Green Checkmark: New certificates are installed, no action needed. - Yellow Caution Badge: Update pending or blocked due to hardware/firmware issues (expected in May 2026). - Red Stop Icon: Alerts users that older certificates are expiring, potentially preventing essential boot-level security updates (may appear as early as June 2026). The status will also be indicated in the Windows Security system tray icon. Most users will have a seamless update process by keeping Windows Update enabled, with devices from 2025 and many from 2024 covered. Older machines will receive updates gradually, guided by major OEMs. Microsoft advises against ignoring yellow or red warnings, as devices without updated certificates may be vulnerable to security threats and incompatible with future Windows updates. A support resource is available at aka.ms/getsecureboot.
Microsoft's Secure Boot certificates expire in June 2026, but older PCs may never get the fix
Winsage
March 7, 2026

Microsoft’s Secure Boot certificates expire in June 2026, but older PCs may never get the fix

Every Secure Boot-enabled Windows PC relies on cryptographic certificates issued by Microsoft in 2011, embedded in the motherboard's firmware, to ensure a secure boot process. The first of these certificates will expire on June 24, 2026, which will affect the ability to receive future security updates for critical components of the Windows startup process. Microsoft is rolling out replacement certificates through Windows Update, marking a significant security maintenance effort. Secure Boot operates as a chain of trust with certificates stored in the motherboard's UEFI firmware, validating software before the operating system loads. The Platform Key (PK) is at the top of this chain, followed by the Key Exchange Key (KEK) and the Signature Database (DB). The replacement certificates introduced in 2023 restructure certificate management, separating responsibilities among different certificate authorities to enhance the trust model. Not all PCs are affected by the upcoming expiration; newer devices manufactured since 2024 already have the new certificates. Windows 10 users face challenges as support for this version ends in October 2025, and they will not receive the new certificates unless enrolled in Extended Security Updates. Home users should ensure their PCs are set to receive updates automatically, while enterprise environments require coordination for firmware updates before the Windows certificate update.
silver Android smartphone
Winsage
March 6, 2026

Microsoft’s Secure Boot certificates expire in June 2026, but older PCs may never get the fix

Every Secure Boot-enabled Windows PC relies on cryptographic certificates issued by Microsoft in 2011 for boot process integrity. The first of these certificates will expire on June 24, 2026, impacting the ability to receive future security updates. Microsoft is rolling out replacement certificates through Windows Update, requiring collaboration between Microsoft, PC manufacturers, and users. Three critical certificates will expire: the Microsoft Corporation KEK CA 2011 and Microsoft UEFI CA 2011 in June 2026, and the Microsoft Windows Production PCA 2011 in October 2026. The new certificates introduced in 2023 have a restructured functionality to enhance security. Not all PCs are affected; newer devices manufactured since 2024 come with the new certificates. Windows 10 users face challenges as support ends in October 2025, and unsupported devices will not receive updates. Home users should ensure automatic Windows updates and check for firmware updates, while enterprise environments must verify firmware updates before applying certificate updates. The first certificate expiration is on June 27, 2026.
Microsoft's latest update patches six zero-days and two critical flaws - but is it another buggy mess?
Winsage
February 12, 2026

Microsoft’s latest update patches six zero-days and two critical flaws – but is it another buggy mess?

Microsoft's February Patch Tuesday update addresses feature and security bugs, continuing the refresh of Secure Boot certificates to protect against bootkit malware. Secure Boot prevents malicious software from executing during startup by using trusted certificates, many of which are set to expire in June. The update is available for both Windows 11 and Windows 10 users, with the latter needing to be enrolled in the Extended Security Updates (ESU) program until October 2026. Windows 11 fixes include resolutions for full-screen gaming and WPA3-Personal Wi-Fi connectivity issues, while Windows 10 improvements address Chinese fonts, specific graphics processing units, and custom folder names in File Explorer. A bug causing unexpected restarts in Secure Launch-compatible PCs has also been fixed. The update includes 55 security patches, a decrease from January's 114, with two classified as critical and six identified as zero-day vulnerabilities. One vulnerability exploited in the wild could allow system privilege escalation, another could disrupt network connectivity, and a third could disable security controls and access sensitive data. Users can update their Windows 11 PCs through System > Windows Update, and Windows 10 users through System > Update & Security. Due to previous buggy updates, users may consider waiting a few days before installing the February update, with the option to uninstall if issues arise.
Windows PCs ‘Suddenly’ Fail After Microsoft’s New Update
Winsage
January 26, 2026

Windows PCs ‘Suddenly’ Fail After Microsoft’s New Update

Microsoft has acknowledged an issue where certain devices fail to boot, resulting in a Black Screen of Death (BSOD) with the stop code UNMOUNTABLEBOOTVOLUME, affecting users of Windows 11 25H2 and 24H2 who installed the KB5074109 update. This update was intended to address numerous security vulnerabilities. Users encountering the 0xED error code may face system corruption or hardware failures, and while Windows Recovery is usually effective, it may fail in some cases, requiring a clean installation of Windows using an ISO file. Microsoft describes the reports as limited but acknowledges the potential for the issue to expand as more users report their experiences.
EDRStartupHinder Disables Antivirus and EDR Protections During Windows 11 25H2 Startup
Winsage
January 12, 2026

EDRStartupHinder Disables Antivirus and EDR Protections During Windows 11 25H2 Startup

A new tool named EDRStartupHinder was unveiled on January 11, 2026, which allows attackers to inhibit the launch of antivirus and endpoint detection and response (EDR) solutions during the Windows startup process. Developed by security researcher Two Seven One Three, it targets Windows Defender and various commercial security products on Windows 11 25H2 systems by redirecting essential system DLLs during boot using the Windows Bindlink API and Protected Process Light (PPL) security mechanisms. The tool employs a four-step attack chain that includes creating a malicious service with higher priority than the targeted security services, redirecting critical DLLs to attacker-controlled locations, and modifying a byte in the PE header of the DLLs to cause PPL-protected processes to refuse loading them. This results in the termination of the security software. EDRStartupHinder has been tested successfully against Windows Defender and other unnamed antivirus products, demonstrating its effectiveness in preventing these security solutions from launching. The source code for EDRStartupHinder is publicly available on GitHub, raising concerns about its potential misuse. Security teams are advised to monitor for Bindlink activity, unauthorized service creation, and registry modifications related to service groups and startup configurations to detect this attack vector. Microsoft has not yet issued any statements regarding patches or mitigations for this technique.
Microsoft Warns October 2025 Updates May Trigger BitLocker Recovery on Some Windows Systems
Winsage
November 5, 2025

Microsoft Warns October 2025 Updates May Trigger BitLocker Recovery on Some Windows Systems

Microsoft has acknowledged an issue affecting Windows 11 versions 24H2 and 25H2, as well as Windows 10 version 22H2, where users of specific Intel-based devices encounter unexpected BitLocker recovery screens after installing updates released on or after October 14, 2025. This problem is linked to devices with Connected Standby technology, which affects the startup process but does not indicate a continuous encryption issue. Entering the recovery key resolves the prompt, and subsequent boots do not trigger additional prompts. Microsoft has activated a Known Issue Rollback (KIR) to address the issue without requiring users to uninstall previous patches. Server editions of Windows are unaffected, and users are advised to monitor the Windows Release Health dashboard for updates.
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