You don't say where the site was that is giving this advice - I have multiple computers with Win 7 and I can't find a path like what you're describing. Security Settings refers to your fire wall and/or file sharing. System Services is under Administrative services (in the Control Panel).
My first instinct is to make sure your virus scanner is working - some of these buggers give warnings exactly like the one you're describing so you'll go to their site to 'fix' it and then you're really stuck.
Go to the Microsoft website and see what the help desks and forums are saying - if this is a real issue then that is the place to find out and find a real solution.
