Security Scan Plus is simply a utility that scans for software it thinks you should have, something that installs as an option with other products, Adobe for instance. Uninstall it in the normal manner via Control Panel.
As you use VSE are you sure it's the consumer SiteAdvisor you want and not SA Enterprise? If the latter I can move this to that section.
Either way I think I will have to move it as we have no knowledge of Enterprise products in this area.
Moved to SAE for better handling.