Windows 11 January Security Update KB5074109 Triggers Widespread Stability and Remote Desktop Issues
Microsoft’s January 2026 Patch Tuesday release for Windows 11 (notably KB5074109 for 24H2/25H2) delivered roughly 100+ security fixes (including reported zero-days) but also introduced significant reliability regressions. Reported impacts include system lockups, black screens on systems with Nvidia/AMD GPUs, graphics-related hangs in GPU/DirectX-intensive applications, and application failures such as Outlook Classic freezing or failing to launch; additional issues were reported with File Explorer behavior and cloud-backed storage workflows (e.g., OneDrive/Dropbox) causing apps to become unresponsive when saving or syncing data.
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