# Microsoft rushes a fix for its biggest patch ever

> September's record 1,000-flaw Windows patch broke Remote Desktop, USB audio, and Hyper-V, so Microsoft shipped an emergency fix.
- Title: Microsoft rushes a fix for its biggest patch ever · The Verge
- Summary: September's record 1,000-flaw Windows patch broke Remote Desktop, USB audio, and Hyper-V, so Microsoft shipped an emergency fix. If you installed September's…
- Keywords: microsoft, windows 11, patch tuesday, bugs, updates, technology, culture, rushes, fix, biggest, patch, ever
- Source: The Verge — https://theverge.com/news/995302/microsoft-out-of-band-windows-11-update-fix-issues
- Author: Tom Warren
- Published: 2026-09-15T08:54:48+00:00
- Read time: 1 min
- Topics: microsoft, windows 11, patch tuesday, bugs, updates, technology, culture
## An emergency fix lands
Microsoft has started rolling out an out-of-band update to clean up problems its September Patch Tuesday release caused.
## The biggest patch ever
September's update closed nearly 1,000 flaws, a record for Microsoft. It also introduced new bugs that hit businesses, developers, and gamers.

> it also introduced some bugs that have affected businesses, developers, and gamers
## What actually broke
Folder shares on Hyper-V Linux virtual machines stopped working, Remote Desktop Services sessions misbehaved, and some USB audio devices failed.
## Who gets the update
The fix covers Windows 11 versions 26H1, 25H2, and 24H2, plus Windows Server 2025 and 2022, Windows 10 LTSC, and Windows Server 2012 and 2012 R2.
## Emergency updates are routine now
These used to be rare. In January a buggy Windows 11 patch forced four of them, and March brought two more over install failures and sign-in problems.

> In the past it was unusual for Microsoft to issue out-of-band updates to Windows, but it has become far more common this year.
## A pattern through the year
July brought another emergency update for an Intel driver issue that drained battery and slowed machines. Four rounds of cleanup in nine months.
## Key takeaway

If you installed September's Patch Tuesday update and something broke, the out-of-band fix is already out. Install it.