Microsoft has published the KB5065429 cumulative update for Windows 10 22H2 & 21H2, as part of September 2025 Patch Tuesday.
Key Highlights
- Fixes 2 zero-day vulnerabilities + 81 flaws.
- Fixes severe lag & stuttering in NDI streaming software.
- Fixes unexpected UAC prompts affecting MSI installers (e.g., Office 2010, AutoCAD).
- Introduces Windows Backup for Organizations, enabling seamless device transitions and enterprise-grade restore.
- Enhancements for SMB client/server auditing, Windows Hello, Search Pane, Family Safety, and more.
Builds Updated
- 22H2 → Build 19045.6332
- 21H2 → Build 19044.6332
Mandatory Update
This update will automatically install via Windows Update. Users can also manually trigger installation or download via the Microsoft Update Catalog.
With Windows 10 reaching end of life in Oct 2025, Microsoft is focusing on stability, compatibility, and enterprise readiness ahead of transitions to Windows 11 and AI-powered PCs.
At Alcaeus Services, we ensure organizations apply critical updates, mitigate zero-day risks, and keep systems secure without disrupting productivity.
