Search Windows Update searches for missing updates. This information (open updates) is then displayed in the Update Center.
Download Windows Update only downloads update packages but does not install them.
There are several settings to customize the download to your company needs.
The first setting is selecting the Source. The selection is between all Microsoft Updates (Windows + other Microsoft products), Group Policy Defaults (settings that additionally control how/when/where updates are applied), WSUS Updates (Updates controlled by your organization’s WSUS server, instead of directly from Microsoft.) and Windows Updates (Windows OS patches).
Denied and Allowed Update List allows you to add Deny and Allow lists. For more information regarding this, please read:
Additional WuInstall Options allow you to add commands for WuInstall like for example “/accept_all”.
