# Microsoft issues Windows 11 out-of-band fix for patch regressions

_Published Tuesday, September 15, 2026 at 8:07 AM EDT · Products · Latest · Tier 2 — Notable_

![Error — Primary](https://cdn.mos.cms.futurecdn.net/ZwKwBGT6Ao4MECeuHFNjZF-2048-80.png)

Microsoft issued an out-of-band update for a recent Windows 11 patch after it caused multiple regressions, including Remote Desktop Services instability that could disrupt connections and sign-ins. The emergency update also addresses audio input and output failures and a problem that prevented Claude Cowork from working with HC-managed Linux virtual machines using Plan9 shared folders. Reports of AMD Radeon crashes, Explorer black screens and other hardware-specific issues remain in the supplied account.

## Sources

- [Tom's Hardware](https://www.tomshardware.com/software/windows/windows-september-2026-update-brings-many-long-requested-features-but-also-surfaces-fresh-bugs-windows-11-update-causes-crashes-on-amd-graphics-explorer-hang-ups-and-broken-third-party-integrations)

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Canonical: https://techandbusiness.org/newswire/5rFn2o1QZq6b717JvQ_t4P
Published: 2026-09-15T12:07:11.655Z
Story chronology: 2026-09-15T11:00:00.000Z
Retrieved: 2026-10-30T21:12:20.593Z
Publisher: Tech & Business (techandbusiness.org)