The KB5063878 Windows 11 24H2 cumulative update, released earlier this week, fails to install on some systems according to widespread reports from Windows administrators.

As many admins have reported on social media and BleepingComputer , this issue affects Windows Server Update Services (WSUS) users, who are experiencing 0x80240069 errors when installing the August 2025 security updates.

On impacted devices, users will also see "Service wuauserv has unexpectedly stopped" and "The Windows Update service terminated unexpectedly" messages in the event log.

"I'm in WSUS environment, the update is approved but all of the existing 24H2 client failed to install, with error code - Download Error - 0x80240069. Tried to decline in WSUS and approve again still no luck," someone said .

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