Scan won't start / Email & downloading problem

I can't receive or send email via Windows Live Mail.  (Vista OS.)   I also can't download files.

 

I tried to run a Scan, to make sure nothing was infecting my computer.  But the Scan will not initiate.  I can click the boxes for Quick Scan / Comprehensive Scan / Let Me Choose --- but nothing happens when I click the Go button for any of those options.

 

I am using Norton 360 v. 4.