Microsoft fixes KB5089549 Windows security update install issues

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Microsoft has released an official fix in the Windows 11 preview cumulative update KB5089573 (May 26, 2026) and later updates. Installing these updates resolves the installation failure issue. For devices running earlier updates experiencing this problem, Microsoft recommends using the Known Issue Rollback feature or configuring the appropriate Group Policy to mitigate the issue. No other workarounds are necessary if the latest updates are applied.