Microsoft released its January 2026 Patch Tuesday security update (KB5074109) on January 13, 2026, addressing 114 security vulnerabilities including one actively exploited zero-day. While the update delivered critical security patches, it triggered multiple system failures affecting Windows 11 users across different versions. Remote Desktop authentication failures, shutdown bugs on devices with Secure Launch, and gaming performance drops on Nvidia GeForce GPUs forced Microsoft to issue emergency out-of-band updates within days.
The issues affected Windows 11 versions 24H2, 25H2, and 23H2, with enterprise environments facing Azure Virtual Desktop connection failures. Microsoft acknowledged the problems and released KB5077744 for 24H2/25H2 and KB5077797 for 23H2 on January 17, 2026. Several reported issues remain unpatched, including black screen glitches and Outlook Classic freezes affecting POP account users.
⚠️ Windows Security Update Status: January 2026
Critical Patches Released — Emergency Fixes Deployed
Update Timeline & Resolution
How to Install Emergency Out-of-Band Updates
Official Microsoft Resources & Related Updates
🔗 Microsoft Support: KB5074109 Security Update Details 🔗 Microsoft Support: KB5077744 Out-of-Band Update (24H2/25H2) 🔗 Microsoft Support: KB5077797 Out-of-Band Update (23H2) 🔗 Microsoft Update Catalog – Manual Download Portal 📱 Apple Creator Studio Subscription Launch Details 🎮 RTX 5070 Ti Supply Constraints & Production Status 📧 Gmail Address Change Feature Rollout 💻 Snapdragon X2 Elite Laptops SpecificationsThe January 2026 Windows 11 security update cycle addressed 114 vulnerabilities through KB5074109 while introducing system failures requiring emergency out-of-band patches. Microsoft deployed KB5077744 and KB5077797 to resolve Remote Desktop authentication failures, Azure Virtual Desktop connection errors, and Secure Launch shutdown bugs affecting Enterprise and IoT editions.
The update timeline covered issues from January 13 through January 19, 2026, with fixes available through Microsoft Support channels and the Update Catalog. Nvidia GPU performance degradation and Outlook Classic POP account freezes remain under investigation without confirmed resolution dates.
