Industry observers note that now a week later, the publisher has dropped emergency out-of-band updates for both Windows 11 and Windows 10 to address some of those issues. Microsoft’s September Patch Tuesday fixed a record 700+ security vulnerabilities across Windows versions , but it also caused some issues—most notably the breaking of USB audio on Windows 11 .
In a fresh development, windows 11’s KB5129195 patch.
In a fresh development, revision KB5129195 resolves some (but not all) of the issues affecting the Windows 11 audio system, plus further issues relating to Claude Cowork and Remote Desktop Services (RDS).
According to the latest update, some PCs with AMD Radeon GPUs are also facing issues, but this patch doesn’t address that yet—nor does it address issues with File Explorer and File History that were also introduced on Patch Tuesday.
As part of the ongoing story, it contains fixes from previous updates, and it also addresses a newly discovered elevation of privilege (EoP) security flaw. Installation should take about 10 minutes depending on devices and requires a restart. Microsoft is automatically rolling out the emergency KB5129195 patch to all Windows 11 PCs as a mandatory, cumulative, out-of-band patch.
In a fresh development, windows 10’s KB5129236 patch.
As part of the ongoing story, according to the changelog, the patch resolves the following issues:. For Windows 10 versions 22H2 and 21H2, Microsoft has dropped a separate emergency patch called KB5129236 .
The report highlights that in affected environments, RDS might become unstable, causing RDP connection and sign-in failures or servers to become unresponsive during Remote Desktop configuration. Related tools, including Microsoft Management Console (MMC), RDS Licensing Diagnoser, File Explorer, and the Windows Revision page, might also stop responding. [Remote Desktop Services (known issue)] Fixed: This patch addresses an issue affecting Remote Desktop Services (RDS) after installing the September 2026 Windows security patch (KB5122878).
In a fresh development, folders shared from the Windows host using Plan9 did not appear or could not be accessed in the guest environment. [Hyper-V (known issue)] Fixed: Some applications that use HCS-managed virtual machines experienced issues when sharing host folder with Linux VMs using Plan9.
The report highlights that (Note: There are other audio symptoms not resolved in this OOB patch. See the “Known issues in this patch” section for more information.). [8-channel or 3D audio modes] Fixed: Some USB Audio Class 1.0 devices functioning as expected in standard stereo configurations failed when using multichannel audio functions, including 8-channel or 3D audio modes.