Microsoft began rolling out an emergency out‑of‑band update on 14 September 2026 to fix Remote Desktop, USB audio and Hyper‑V issues that were introduced by its record‑breaking September Patch Tuesday update for Windows 11 versions 24H2, 25H2 and 26H1.
What the September Patch Tuesday broke
The September Patch Tuesday update, released on 12 September 2026, patched nearly 1,000 flaws but also triggered three high‑impact problems. According to The Verge, the update disrupted folder shares on Hyper‑V‑based Linux virtual machines, broke Remote Desktop Services sessions, and caused failures in some USB audio devices.
Emergency out‑of‑band update details
The out‑of‑band update, described by The Verge as “emergency”, was released “yesterday” on 14 September 2026 (the article dated 15 September 2026 says it was released the day before). It directly addresses the three problem areas across the three most recent Windows 11 releases – 24H2, 25H2 and 26H1 – and also includes fixes for Windows Server 2025, Windows Server 2022, the LTSC versions of Windows 10, and Windows Server 2012/2012 R2.
Microsoft’s statement that the update “fixes Remote Desktop, USB audio, and Hyper‑V issues” is the only concrete remedy offered so far. No further patches have been announced for the September Patch Tuesday bugs, and Microsoft has not disclosed a full rollout schedule or the percentage of devices already updated.
Company context and scale
Microsoft (NASDAQ: MSFT) is headquartered in Redmond, Washington, and is led by CEO Satya Nadella. The firm employs roughly 221,000 people worldwide. While the current story is about a software update, the company’s broader financial footing provides context for its ability to issue rapid fixes.
| Metric | Value | Period | Unit |
|---|---|---|---|
| Revenue | 36.148 billion | Q3 FY 2011 (ended 31 Dec 2010) | USD |
| Net income | 133.749 billion | FY 2026 (ended 30 Jun 2026) | USD |
| Total assets | 758.376 billion | FY 2026 (ended 30 Jun 2026) | USD |
| Shareholders’ equity | 442.387 billion | FY 2026 (ended 30 Jun 2026) | USD |
| Shares outstanding | 7.427 billion | FY 2026 (ended 30 Jun 2026) | shares |
| Source: Microsoft Form 10‑K filed 29 July 2026 (SEC) | |||
These figures show a company with deep cash reserves and a sizable equity base, underscoring why Microsoft can afford to issue multiple out‑of‑band updates in a single year – a practice that has become “far more common this year”, according to The Verge.
Businesses that rely on Hyper‑V‑based Linux VMs, remote desktop infrastructure, or USB audio peripherals were among the most immediately affected. The September Patch Tuesday bugs “have affected businesses, developers, and gamers”, as reported by The Verge. By delivering a targeted fix within two days, Microsoft aims to minimise downtime for corporate IT departments that may have already begun workarounds.
However, the update does not address every downstream effect. The Verge notes that Microsoft also released updates for older server and Windows 10 LTSC versions, but it does not specify whether those updates contain the same bug fixes or merely security patches. Enterprise IT leaders will need to verify that the out‑of‑band update has been applied to all relevant endpoints before confirming that the issues are fully resolved.
What remains unknown is the exact adoption rate of the out‑of‑band update and whether any residual bugs persist after deployment. Microsoft has not provided a timeline for when the update will be considered fully rolled out across the global Windows 11 user base.
For now, the emergency update represents the most concrete step Microsoft has taken to remediate the September Patch Tuesday fallout. Companies should monitor their update management tools for the new package and plan for a brief testing window before wide‑scale deployment.