Carlton, I meant no offense.... but read your question from an outside point of view, and tell me it wasn't a daft question?
Now you have explained a little further it makes sense a bit more!
the warnings will probably be for certain files that the scanner was unable to scan, and probably nothing to worry about.... next time you scan look for a button that says something like "more info" or "view logs" and it will tell you excatly what the warnings are about. (or check the current logs and see what the 4 warnings you just got are about)
(thanks Craft ;)) x