Need help on antivirus software

[marshabayton]

Hi!!
I am new to this forum and also a newbie to software stuff. I don’t have much knowledge about computers. I use my computer just to send or receive emails. While checking my mails I get lots of pop ups which are advertisements. Earlier the number of these pop ups was less but off late it has become very difficult to check my emails because when I try to close them it freezes my system and only option left is to restart the pc. I don’t have any antivirus software installed on my PC and now I am bound to look for one.
Also while doing my bit of research on the net I came across two software : Internet security software http://www.ecostsoftware.com/symantec/norton-internet-security-2009_p3974 and antivirus software http://www.ecostsoftware.com/symantec/norton-antivirus-2009-1-user-3-pcs_p3987 . Is there any difference between the two? Which one should I opt for? Sorry for an amateurish post!

[Carbon Dudeoxide]

One of them is Norton Internet Security 2009 and the other one is Norton Antivirus 2009.

You can compare the two products here:
http://www.symantec.com/norton/antivirus
(when you get to that page, click on Compare Related Products)

Note: DO NOT get Norton 360.
Note2: There are other Free Antivirus programs out there that do just as well as paid ones if you're interested.