# Microsoft: Recent Windows updates cause SQL Server performance issues

Source: [BleepingComputer](https://www.bleepingcomputer.com/news/microsoft/microsoft-recent-windows-updates-cause-sql-server-performance-issues/) · 2026-11-12 · Security
Page: https://themorning.dev/story/microsoft-recent-windows-updates-cause-sql-server-performance-issues-00c8c05e542b9aad
Kind: outage · Impact: high

## In brief

- Microsoft has confirmed that Windows updates released since the October 2026 Patch Tuesday cause SQL Server performance and stability issues.
- A change has caused linked server queries to fail to close connections.
- Linked servers via OLE DB providers are the affected setup, according to The Register.

## Why it matters

Teams running SQL Server may see connection problems, performance degradation or instability after installing recent Windows updates, especially if they rely on linked server queries.

## Timeline

- 2026-11-12: Microsoft confirms that recent Windows updates cause SQL Server issues

## Coverage

- [Microsoft: Recent Windows updates cause SQL Server performance issues](https://www.bleepingcomputer.com/news/microsoft/microsoft-recent-windows-updates-cause-sql-server-performance-issues/) — BleepingComputer, 2026-11-12
- [Microsoft admits SQL Servers might wobble after October update](https://www.theregister.com/databases/2026/11/12/microsoft-admits-sql-servers-might-wobble-after-october-update/5309349) — www.theregister.com - Articles, 2026-11-12

Tags: sql-server, windows, microsoft, regression, performance, databases

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev