KB5082052: improves reliability when Windows uses SMB compression over QUIC

April 14, 2026—KB5082052 (OS Build 22631.6936)

Improvements
This update addresses security issues for your Windows operating system

This security update contains fixes and quality improvements from KB5078883 (released March 10, 2026). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.

[Secure Boot]​​​​​​​

• New! The status of Secure Boot certificate updates on your device may be displayed in the Windows Security app (Settings > Privacy & security > Windows Security). Learn more about the status alerts via badges and notifications. These enhancements are disabled by default on commercial devices.
• With this update, Windows quality updates include additional 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 addresses an issue where the device might enter BitLocker Recovery after the Secure Boot updates. ​​​​​​​
• [Networking] This update improves reliability when Windows uses SMB compression over QUIC. After you install this update, SMB compression requests over QUIC complete more consistently, reducing the likelihood of timeouts and supporting smoother, more dependable performance.
• [Remote Desktop] This update improves protection against phishing attacks that use Remote Desktop (.rdp) files. When you open an .rdp file, Remote Desktop shows all requested connection settings before it connects, with each setting turned off by default. A one-time security warning also appears the first time you open an .rdp file on a device. For more information, see Understanding security warnings when opening Remote Desktop (RDP) files.
• ​​​​​​​[Sign-In] Fixed] After you install the Windows update released on or after March 10, 2026, some users might experience an issue signing in to apps with a Microsoft account. Even when the device has a working Internet connection, a “no Internet” error appears during sign in and prevents access to Microsoft services and apps such as Microsoft Teams.