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Microsoft Releases Emergency Windows 11 Update to Fix Record-Breaking Patch Issues
Confirmed
In Short: Microsoft has rolled out an emergency out-of-band update to address bugs introduced in its September patch Tuesday, affecting multiple Windows versions.
Microsoft has started rolling out an emergency out-of-band update to fix problems with its record-breaking September patch Tuesday update, according to reports. The update addresses issues with Remote Desktop, USB audio, and Hyper-V, among others, that affected businesses, developers, and gamers.
The update, which is rolling out now, addresses multiple critical issues, including a bug that broke audio on some PCs, according to Windows Latest. The update is available as '2026-09 Security Update (KB5129195) (26200.9457)' on Windows 11 25H2 and takes approximately 10 minutes to download and install.
Microsoft also released updates for Windows Server 2025 and 2022, the LTSC versions of Windows 10, and Windows Server 2012 and Windows Server 2012 R2, according to The Verge. The update fixes nearly 1,000 flaws in its biggest update ever this month, but it also introduced some bugs that have affected businesses, developers, and gamers.
Microsoft told me today’s emergency update downloads automatically on all PCs, and it also includes additional security protections against an ‘elevation of privilege’ vulnerability, according to Windows Latest. The update addresses issues such as folder shares on Hyper-V-based Linux virtual machines, Remote Desktop Services sessions, and some USB audio devices.
What's confirmed
- Microsoft has started rolling out an emergency out-of-band update to fix problems with its record-breaking September patch Tuesday update, according to reports. The update addresses issues with Remote Desktop, USB audio, and Hyper-V, among others, that affected businesses, developers, and gamers.
- The update, which is rolling out now, addresses multiple critical issues, including a bug that broke audio on some PCs, according to Windows Latest. The update is available as '2026-09 Security Update (KB5129195) (26200.9457)' on Windows 11 25H2 and takes approximately 10 minutes to download and install.
- Microsoft also released updates for Windows Server 2025 and 2022, the LTSC versions of Windows 10, and Windows Server 2012 and Windows Server 2012 R2, according to The Verge. The update fixes nearly 1,000 flaws in its biggest update ever this month, but it also introduced some bugs that have affected businesses, developers, and gamers.
- Microsoft told me today’s emergency update downloads automatically on all PCs, and it also includes additional security protections against an ‘elevation of privilege’ vulnerability, according to Windows Latest. The update addresses issues such as folder shares on Hyper-V-based Linux virtual machines, Remote Desktop Services sessions, and some USB audio devices.
What's still developing
- Having already done so for macOS, Google has finally released a dedicated Gemini app for Windows.
- Having an app means that Windows users no longer have to rely on the browser-based version of Gemini, and it gives Google a more even footing for competing with other AI-powered tools.
- Google describes the Gemini app for Windows as “lightweight and quiet”, and says that it “runs without slowing down your PC”.
- Announcing the release, Google highlights a trio of ways in which the Gemini app for Windows can be used to get things done: 1.
- Microsoft also released an out-of-band update in July to address an Intel driver issue that was causing performance issues and battery drain.
- I noticed that Microsoft updated its CVE-2026-62721 listing on MSRC (Microsoft’s security portal) and noted that the initial update didn’t completely resolve the security issue.