Microsoft has released an emergency out-of-band update for Windows 11 after its record-breaking September Patch Tuesday release caused several problems for users.
The company addressed nearly 1,000 security flaws in the massive update, but the release also introduced bugs affecting businesses, developers, and gamers.
The September update caused issues with folder shares on Hyper-V-based Linux virtual machines, Remote Desktop Services sessions, and some USB audio devices. Microsoft has now released an out-of-band update to address those problems across Windows 11 versions 26H1, 25H2, and 24H2.
The company has also issued corresponding updates for Windows Server 2025 and Windows Server 2022, Windows 10 LTSC editions, and Windows Server 2012 and Windows Server 2012 R2.
Emergency Windows updates have become increasingly common for Microsoft this year. In January, the company had to release four out-of-band updates after a problematic Windows 11 patch caused multiple issues. Microsoft followed that with two emergency updates in March to address installation failures and problems signing in with Microsoft accounts.
In July, Microsoft released another out-of-band update after an Intel driver issue caused performance problems and increased battery drain. The latest emergency release adds to a growing list of situations in which Microsoft has had to quickly patch problems introduced by its regular Windows updates.
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