KB5075941

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• [Secure Boot] 

  • ​​​​​​​​​​​​​​This release will execute updates in the Boot Manager on devices that already have the Windows UEFI CA 2023 certificate in their Secure Boot Signature Database (DB). It replaces the 2011 signed bootmgfw.efi with the 2023 signed bootmgfw.efi. Be advised of the consequences of resetting the DB or turning Secure Boot on or off, as this can cause a "Secure Boot violation" issue. In those rare cases, the solution is to create the Secure Boot recovery media. 

    • With this update, Windows quality updates include a broad set of targeting data that identifies devices and their ability to receive new Secure Boot certificates. Devices will receive the new certificates only after they show sufficient successful update signals, which helps ensures a safe and phased rollout.

• [Display & Graphics] Fixed: This update addresses an issue caused the Desktop Window Manager (DWM) process to re‑start unexpectedly. ​​​​​​​

• [File Explorer] Fixed: This update addresses an issue where folder renaming with desktop.ini files in File Explorer isn't work correctly. The LocalizedResourceName setting is ignored, so custom folder names don't appear.

• [Fonts & Display] Updates the Chinese fonts to support the GB18030‑2022A standard for character coverage and display.

• [Graphics] Fixed: This update addresses an issue where certain GPU configurations might recently have experienced a system error related to dxgmms2.sys, resulting in the KERNEL_SECURITY_CHECK_FAILURE error.

• [OS Security (known issue)] Fixed: After installing the Windows security update released on or after January 13, 2026, some PCs which run Virtual Secure Mode (VSM) are unable to shut down or enter hibernation. Instead, the device restarts.

• [Windows Security] Fixed: This update addresses an issue that affected Microsoft Defender SmartScreen Application Reputation (AppRep) events from being logged. This interrupted event tracking used for advanced threat investigations.

• [Secure Boot] With this update, Windows quality updates include a broad set of targeting data that identifies devices and their ability to receive new Secure Boot certificates. Devices will receive the new certificates only after they show sufficient successful update signals, which helps ensures a safe and phased rollout.

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