Windows 11’s May update is causing install failures and slow internet — here’s what we know
Microsoft’s latest Patch Tuesday update for Windows 11 is causing significant issues for users worldwide. The KB5089549 update, released on May 13, 2026, has triggered two main problems: installation failures and internet performance degradation.
The most widespread complaint involves installation failures, where affected systems repeatedly attempt to install the update before rolling back to the previous version. This creates a frustrating cycle preventing users from successfully applying the security patch. Simultaneously, a smaller subset of users reports experiencing noticeably slower internet performance after the update successfully installs.
Initial reports emerged shortly after the update rolled out through Windows Update, with growing complaints documented across multiple forums, particularly on Reddit. The timing is concerning, as Windows 11 users rely on these monthly Patch Tuesday updates for critical security improvements. Installation failures prevent users from receiving essential security patches, potentially leaving systems vulnerable to threats. Internet slowdown issues impact productivity and user experience, making systems less responsive for browsing and online activities.
Microsoft has not yet officially acknowledged the issues or provided guidance to affected users, though the company typically investigates Patch Tuesday problems and releases fixes through subsequent updates. This incident underscores the ongoing challenges Microsoft faces in testing updates across Windows 11’s diverse hardware landscape.