Don't use Windowsupdate.microsoft.com but use
update.microsoft.com only. Don't use windowsupdate.microsoft.com even if you don't have Microsoft Office products installed
Why? Simple reason: You are not protected with security patches if you are only using windowsupdate.microsoft.com.
You are protected with security patches if you will use update.microsoft.com
With windowsupdate.microsoft.com, you will get updates for Windows and components in Windows that is shipped in Windows DVD or your installer (ISO file that you've burn into DVD) but you are not going to receive security updates or important updates for Microsoft related software that was not shipped in Windows installer.
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