Microsoft has launched the KB5075912 extended security update for Windows 10 to address numerous vulnerabilities, including six actively exploited zero-day flaws. This release also continues the phased rollout of new Secure Boot certificates to replace expiring credentials and resolves a specific bug that caused system restart issues during attempted shutdowns.
The latest security update for Windows 10 is now available for users enrolled in the Extended Security Update program or those utilizing Enterprise LTSC versions. This February 2026 Patch Tuesday release focuses exclusively on security enhancements and stability improvements rather than new features, as the operating system has moved past its primary development phase. Eligible users can acquire the patch through the standard Windows Update menu within their system settings.
A primary focus of this update is the resolution of 58 distinct security vulnerabilities, with six of those being critical zero-day threats currently being leveraged by attackers. Beyond these security patches, the update addresses a specific technical glitch involving System Guard Secure Launch and Virtual Secure Mode. Previously, this combination caused certain hardware configurations to reboot spontaneously whenever a user attempted to shut down or hibernate their device.
The update also manages a critical transition for the system's underlying security architecture regarding Secure Boot certificates. Because several original certificates from 2011 are set to expire in June 2026, Microsoft is using this update to deploy modern replacements. This rollout is being handled carefully, using telemetry data to ensure that devices are ready for the new certificates without compromising the boot process or allowing unauthorized access to the system.
Several functional bugs have also been addressed to improve the general user experience. These include a fix for a File Explorer error where custom folder names were not displaying correctly due to issues with desktop configuration files. Additionally, the update improves stability for specific graphics processing unit configurations and ensures that Chinese fonts now meet the latest regulatory compliance standards.
Microsoft has indicated that there are currently no known issues associated with this deployment, suggesting a stable transition for those still relying on Windows 10. By integrating these fixes, the company aims to maintain the integrity of the aging operating system against modern cyber threats while preparing for the imminent expiration of long-standing security credentials.
Source: Microsoft Releases Windows 10 KB5075912 Extended Security Update Patch