Hi there,
I'm Cherrelyn and I'm here to help.
This happens because “Update and Shut Down” doesn’t always complete if certain updates need a full restart or if background processes block the shutdown. Windows may appear to ignore it, but the updates are usually applied the next time you fully restart. Please use “Update and Restart” instead of shut down to ensure updates install. Manually restart after selecting “Update and Shut Down” if the PC doesn’t fully apply updates. Make sure fast startup is disabled, as it can prevent some updates from completing on shutdown. It’s a known Windows quirk across versions, including Windows 11, rather than a one-off bug.
I hope this will help and If you have any question please feel free to ask.
Warm regards,
Cherrelyn