Alienware 17 - Can't download WoW

Hey guys! Long time, no see! :D

Okay, so I bought an Alienware 17 a couple of days ago and I can't download WoW. I have tried from the discs and from the website and nothing will work.. It comes up with an error code which links me to this site:

It can't be a problem with my internet because my boyfriends works fine, from both disc and website client. And I have tried both sets of discs and still nothing. It's just on my computer that nothing will work.

I have absolutely no idea how to fix it and it's really beginning to bug me...

I tried downloading SC2 and it works fine, it just doesn't like WoW.

PLEASE PLEASE PLEEAAASSSE if anyone has any suggestions that could help it would be much appreciated! After trying for a couple of days already I'm about half a day from taking it back to the store.