I received Norton 360 as part of the setup when I got a new pc, but this was a trial purchase which has now expired

So I have been looking what to buy now for my pc and am a bit of a novice when it comes to this kind of thing

Can someone explain the difference between Norton 360 vs Norton Internet Security vs Norton Antivirus 2008 ideally which I should get to prevent viruses, spyware etc & protect my pc from being hacked or phished.


Thx