Windows 11 KB5089573 update released with performance improvements

Key Points:

• Microsoft has released the KB5089573 preview cumulative update for Windows 11 versions 25H2 and 24H2, focusing on performance and reliability improvements.
• The update enhances app launch speeds, sign-in behavior, and overall system reliability, but it does not address any security vulnerabilities.
• IT admins are encouraged to test this optional update before general rollout; users should consider installing it to benefit from performance enhancements.

Technical Details: The KB5089573 update introduces builds 26200.8524 and 26100.8524 for Windows 11 versions 25H2 and 24H2, respectively. It also includes updated Secure Boot certificates to replace those expiring in June 2026.

MITRE ATT&CK Techniques: Not applicable - informational content

IOCs Mentioned: None mentioned