Windows 11 KB5127648 Includes Two Known Issues Related to Remote Desktop Connection and USB Audio Issues

Microsoft has confirmed that Windows 11 KB5127648 leaves two frustrating issues unresolved. The October 2026 security update still affects some Remote Desktop connections and USB audio devices. The problems mainly affect enterprise environments and specific audio hardware. Microsoft has listed the symptoms and possible workarounds in the “Known issues” section of the KB5127648 changelog.

Windows 11 KB5127648 leaves Remote Desktop connections broken

The Remote Desktop issue stemmed after the September preview update, KB5124010. Non-admin users may fail to connect to remote devices with Administrator protection enabled. Affected connections can return error 0xC000000D, alongside the message, “The token that was passed to the function is invalid.”

Microsoft recommends IT administrators to temporarily disable Administrator protection on affected hosts. They can reset the User Account Control Type Of Admin Approval Mode policy through Microsoft Intune or Group Policy. However, this workaround reduces protection, so organizations should carefully assess the security implications before applying it.

That said, the October 2026 patch does resolve several other problems. As reported in our coverage of Windows 11 KB5127648 fixes, these include Explorer crashes, AC-3 audio playback failures, and Always On VPN connectivity problems. Users have also reported that Group Policy failure linked to Admin Protection has also been resolved following the October 2026 security update.

USB audio devices still face Code 10 errors

The second known issue affects certain USB Audio Class 1.0 devices. Users may encounter Device Manager’s Code 10 error, missing audio, unresponsive volume controls, or unavailable sound settings.

Microsoft released the out-of-band update KB5129195 on September 14. It resolves the reported problems involving 8-channel and 3D audio modes. However, other symptoms remain unresolved, and Microsoft is still working on a full resolution. For now, affected users may regain audio by switching to two-channel mode, where supported.

Moreover, if you encounter any of these issues after installing KB5127648, there is not much you can do than to wait for a separate patch from Microsoft.