From LedHed's Wiki
Overview
If you're trying to get Windows Update to check for updates for other Microsoft Products and it isn't working try some of these things to get it working.
Default Browser
- If your default browser is anything other than Internet Explorer then when you click the "get updates for other microsoft products" link in WU it will fail to give you the install "Microsoft Updates" option.
- Also note that you may need to add "microsoft.com" to IE's compatibility settings.
References
https://iowacitytechnologyservices.com/2015/10/12/windows-updates-microsoft-products/