Product Launchwindows 11ai modelscopilotpatch tuesday
Windows 11 Rolls Out KB5074109 Patch Tuesday Update
8.3
Microsoft released Windows 11 update KB5074109 as the January 2026 Patch Tuesday release, advancing 25H2 to Build 26200.7623 and 24H2 to Build 26100.7623. The mandatory update, available from Windows Update or the Update Catalog at 10 a.m. PT, is over 4GB because it bundles AI models like Phi and includes rolling features and bug fixes.
Key Points
- 1Advances systems to Build 26200.7623 (25H2) and 26100.7623 (24H2), available Jan 2026 Patch Tuesday.
- 2Bundles AI model Phi, pushing update sizes above 4GB for all hardware including non-AI PCs.
- 3Enables Share with Copilot, Recommended files, dark File Explorer, and handheld full-screen gaming features.
Scoring Rationale
Official Microsoft release with wide impact and actionable fixes, but limited novelty beyond incremental bug fixes and rollouts.
Sources
Public references used for this report.
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