Full System Scan Not Working

I am trying to perform a full system scan but nothing happens. In fact, when I click on either Quick Scan, Full System Scan or Custom Scan nothing happens. I have checked that I have the most recent version.

 

Overall, the NIS software doesn't seem to run very well at all. It takes a while to go from one menu to another and some menus do not appear at all. It's very frustrating. I actually purchased some McAfee software as NIS was (and still is) useless, but it turns out McAfee isn't much better and was causing my laptop to crash. So I went back to Norton and the problems are still persisting. Are they aware that their NIS software performs so badly?

 

I'm actually pretty sure that NIS hasn't been working properly for a while on my laptop, which led to my email be hacked.

 

Any ideas? I have Windows 7.