Protection for Office 2007

I just installed Microsoft Office 2007. Will my  Norton Antivirus 2008 version 15.0.0.58 protect this version of Office?

 

 

also when I read  that there are vulnerabilities in various office products, how do these vulnerabilities cause issues?

I mean someone would hva eto send me say a compromised excel sheet or I'd have to go to a website that has a compromised excel sheet on it right?

I mean just because I may have a product that has a vulnerability, it won't effect me unless I click on something ( as mentioned above)?

I have DSL and on mostly 24/7 to the internet. Could that (just being connected to the internet) cause exploitation of a vulnerability in a Microsoft Office product?