Pcworld iconPcworldSep 14, 2026 ~1 min source read

Windows 11’s September patch breaks USB audio, and there’s no fix yet

Microsoft recently confirmed that the September Patch Tuesday security update (KB5124008) is causing problems with USB audio on some Windows 11 systems. However, Microsoft did not disclose how many users are affected, only stating that some computers with USB Audio Class 1.0 devices are reportedly affected.

Windows 11’s September patch breaks USB audio, and there’s no fix yet

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Microsoft recently confirmed that the September Patch Tuesday security update (KB5124008) is causing problems with USB audio on some Windows 11 systems.

However, Microsoft did not disclose how many users are affected, only stating that some computers with USB Audio Class 1.0 devices are reportedly affected.

On the support page for the update, Microsoft has listed this under its "Known issues in this update" section:

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The useful part

Microsoft recently confirmed that the September Patch Tuesday security update (KB5124008) is causing problems with USB audio on some Windows 11 systems. However, Microsoft did not disclose how many users are affected, only stating that some computers with USB Audio Class 1.0 devices are reportedly affected. On the support page for the update, Microsoft has listed this under its "Known issues in this update" section:

How it works

  • After installing the September 8, 2026, Windows security update, some USB Audio Class 1.0 devices might fail to start or produce audio.
  • Some customers have reported that they're able to restore audio in these cases by switching to 2-channel mode.

Details worth keeping

This issue is limited to USB Audio Class 1.0 devices.

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