Hi,
Thanks for reaching out and sharing what’s happening with the security update. Could you confirm if you see a specific error code or message when trying to install it, and whether other updates have installed successfully? This helps us understand if the issue is limited to one update or part of a bigger Windows Update problem.
In the meantime, try running the Windows Update Troubleshooter by going to Settings > System > Troubleshoot > Other troubleshooters and selecting Windows Update. It often detects and fixes common issues automatically.
You can also check this article for more detailed steps: Troubleshoot problems updating Windows link: https://support.microsoft.com/en-us/windows/troubleshoot-problems-updating-windows-188c2b0f-10a7-d72f-65b8-32d177eb136c
Hope this helps! Let us know how it goes.
Kind regards,
Edward