Security

– Added MS26-09-W11-5129194(Q5129194): September 14, 2026-KB5129194 (OS Build 28000.2956) Out-of-band

– Added MS26-09-W11-5129195(Q5129195): September 14, 2026-KB5129195 (OS Builds 26200.9457 and 26100.9457) Out-of-band

– Added SYSMN-260915(QSYSMON1522A): SYSMON 15.22

Non-Security

– Added MSNS26-09-W10-5129236(Q5129236): September 14, 2026-KB5129236 (OS Builds 19045.7727 and 19044.7727) Out-of-band

– Added MSNS26-09-W10-5129237(Q5129237): September 14, 2026-KB5129237 (OS Build 20348.5631) Out-of-band

– Added MSNS26-09-W10-5129238(Q5129238): September 14, 2026-KB5129238 (OS Build 17763.9247) Out-of-band

– Added MSNS26-09-W10-5129239(Q5129239): September 14, 2026, 2026-KB5129239 (OS Build 14393.9514) Out-of-band

– Added MSNS26-09-W11-5129235(Q5129235): September 14, 2026-KB5129235 (OS Build 26100.33451) Out-of-band

– Added MSNS26-09-W11-5129242(Q5129242): September 14, 2026-KB5129242 (OS Build 22631.7584) Out-of-band

Extended Security Updates

– Added MS26-09-2K12-ESU-5129244(Q5129244): September 14, 2026-KB5129244 (Monthly Rollup) Out-of-band

– Added MS26-09-2K12R2-ESU-5129243(Q5129243): September 14, 2026-KB5129243 (Monthly Rollup) Out-of-band

– Added MSNS26-09-W10-ESU-5129236(Q5129236): September 14, 2026-KB5129236 (OS Builds 19045.7727 and 19044.7727) Out-of-band