Windows 10 KB5122878 is out with the September 2026 Patch Tuesday update, bringing security improvements and important fixes.

Windows 11 KB5124012, KB5124008 and KB5122880 released as September 2026 Patch Tuesday security updates and key fixes.

The September Windows 11 update set a new patching record with almost 1,000 security flaws fixed.

Microsoft’s consumer ESU program includes a no-cost enrollment option for eligible Windows 10 PCs, but managed devices and some account setups are excluded. Millions of Windows 10 PCs now have a ...