Hello, Avie :)
Welcome to the Microsoft community.
Thanks for your feedback. windows update troubleshooting is about to be deprecated. If you are not having problems with your computer, you can leave it alone. Can I see the version of your computer? Press Win+R and type winver, if your version is 22631.3447 then it is the latest version.
Also, you said you can't access the catalog update site, which update are you trying to download?
Best Regards,
Aaron- MSFT | Microsoft Community Support Specialist