By Guru Baran
Publication Date: 2026-01-23 05:09:00
Microsoft’s January 2026 Windows 11 security update KB5074109 has triggered multiple system stability issues, including lockups and black screens, prompting users to uninstall it. Reports highlight graphics regressions and app failures affecting both consumer and enterprise setups.
KB5074109 targets Windows 11 versions 24H2 (build 26200.7623) and 25H2 (build 26100.7623), delivering over 100 security fixes, including three zero-days, alongside non-security improvements like NPU power optimization.
Released on Patch Tuesday, January 13, 2026, it includes servicing stack update KB5071142 and AI components for Copilot+ PCs. Microsoft simplified update titles in this release for clarity.
Graphics and Lockup Problems
Users report full system lockups without blue screens, particularly in graphics-intensive apps like BforArtists 5.0, a Blender fork, when switching viewport shading modes.
These hangs stem from DirectX and GPU driver regressions…
