Windows 11 Gets a Big Security Upgrade

This Week in IT, I look at the most important Build announcements for sysadmins, including a big update to Windows 11 security, updates to the Windows Subsystem for Linux, and Microsoft 365 Copilot announcements.

Links and resources

• Enhance your application security with administrator protection – Windows Developer Blog
• Microsoft Open-Sources WSL, Adds New Windows 11 Dev Tools
• The Windows Subsystem for Linux is now open source – Windows Developer Blog
• Microsoft Expands Copilot for Microsoft 365 with Copilot Tuning
• Introducing Microsoft 365 Copilot Tuning, multi-agent orchestration, and more from Microsoft Build 2025 | Microsoft 365 Blog

Episode overview

This week in IT, Russell looks at key announcements from Build 2025, focusing on security updates for Windows 11, changes to the Windows Subsystem for Linux, and developments related to Microsoft 365 co-pilot.

• Windows 11 Security Update: Microsoft introduced a new security feature called Administrator Protection to enhance security for users logging in with local administrator accounts, addressing risks associated with token theft attacks.
• Administrator Protection Details: This feature allows applications to run under a separate user profile when elevated to administrator privileges, providing a security boundary and requiring authentication for each elevation request. 
• Windows Subsystem for Linux Changes: Microsoft is open-sourcing the Windows Subsystem for Linux (WSL) to encourage developer contributions and accelerate development, while some components will remain closed-source.
• Microsoft 365 Copilot Announcements: Two major features were announced: Copilot Tuning for organizations to train AI models with low code capabilities, and multi-agent orchestration to manage collaborative workflows between different agents.