Windows 11 KB5089573 update released with performance improvements

Source: Bleeping Computer

Windows 11 KB5089573 preview cumulative update

Microsoft has released the KB5089573 preview cumulative update for Windows 11 versions 25H2 and 24H2. The update contains 30 changes, including performance and reliability improvements.

The KB5089573 update is part of Microsoft’s non‑security preview schedule, which introduces new features and fixes at the end of each month so IT admins and users can test them before the next month’s Patch Tuesday rollout. Unlike regular Patch Tuesday cumulative updates, these monthly preview updates are optional and do not include security updates.

With the May 2026 optional update, Microsoft is gradually rolling out general OS performance upgrades and several reliability improvements to Windows Hello.

“This update accelerates app launch and core shell experiences such as Start menu, Search, and Action Center,” Microsoft said in a support document.
“This update improves sign‑in behavior on the lock screen and sign‑in screen. When Windows Hello face or fingerprint is set up and available, it is now the default sign‑in method every time you sign in, even if you used a different method previously. If you need to use your Windows PIN instead and use it three times in a row, Windows will stay with PIN until you switch to another sign‑in method.”

Additional improvements

• Enhanced reliability in File Explorer, on the sign‑in and lock screens, when changing themes in Settings, and when using touch gestures on touchscreen devices.
• Better performance when resuming from Modern Standby.
• Fewer unexpected blocks during Windows Hello Enhanced Sign‑in Security authentication.

KB5089573 preview update (BleepingComputer)

Installation

You can install the update by:

• Downloading it from the Microsoft Update Catalog, or
• Opening Settings → Windows Update and selecting “Check for updates.”

Because this is an optional update, you will be prompted to click “Download and install” unless you have enabled the “Get the latest updates as soon as they’re available” option, which installs it automatically.

Windows 11 KB5089573 highlights

Once installed, the optional non‑security update upgrades Windows 11 25H2 and 24H2 devices to builds 26200.8524 and 26100.8524, respectively. Key improvements include:

• Shared audio – lets two people listen to the same audio simultaneously on a single Windows 11 PC. (details)
• Improved CPU speed display on the Performance page of Task Manager for VMs, eliminating inflated numbers after resuming from hibernation.
• Sensors – increased resiliency against apps that could keep the sensor hub powered on, improving battery life.
• Human Interface Device (HID) – better HID and input‑stack battery life for failed HID devices; enhanced power hygiene against applications that might initiate HID transfers during standby.
• Expanded high‑confidence device targeting data for Secure Boot certificate rollouts, ensuring devices receive new certificates only after demonstrating sufficient successful update signals.

Microsoft also reminded users that updated Secure Boot certificates are rolling out to replace the original 2011 certificates, which expire in late June.

• Earlier in the year, Microsoft announced plans to refresh expiring Secure Boot certificates on eligible Windows 11 systems.
• A known issue affecting Windows Server 2016 systems—domain controller lookup failures after installing the KB5087537 May 2026 security update—has been confirmed.