Windows 11’s May update is causing install failures and slow internet — here’s what we know
windowscentral.com May 16, 2026

Windows 11’s May update is causing install failures and slow internet — here’s what we know

AI-summarised brief · reviewed before publication

Microsoft's latest Patch Tuesday update for Windows 11, KB5089549, is causing installation failures and slow internet issues for some users. The update, released on May 13, 2026, fails to install on certain computers, with error messages and automatic rollbacks to the previous version. A smaller group of users reports slowed internet performance after installation. The issue appears tied to Windows 11 systems running the May 2026 cumulative update, with complaints emerging on forums like Reddit. Microsoft has not acknowledged the issue, and the health dashboard page lists no known issues. The problems are frustrating but not causing widespread boot failures or corrupted installations, with some users experiencing repeated installation failures.

💡 Why It Matters

  • · The recurring installation failures raise questions about deeper compatibility problems affecting certain hardware configurations, drivers, or servicing components.
  • · Slowed internet speeds after installation also suggest potential networking bugs that could impact user experience.