dgg,
Just dealing with the money side of things....
I don't know "WallyWorld" but assuming"
you are in the USA and this is Wal-Mart as I understand it you have bought a retail package of NIS on a CD and tried installing that from the CD and would have used it's KEY if you had gotten to the Activate point but didn't get that far or created a MyNortonAccount to save it.
you then went on line to the Norton Store and bought a copy of NIS which you have been able to download and save on a computer but have not succeeded in installing and have not used that KEY or created a MyNortonAccount to save it.
you paid more for one of those two purchases -- I'd guess for the online download from Norton since retailers often have discounts and rebates
Then you should stick with using the cheaper KEY but use the downloaded copy to install.
All of which is a lead up to the fact that Norton have a 60 day satisfacteion warranty under which they will refund your purchase price whether from them or from on retail store so you can get refunded your purchase of the more expensive one which I'll assume is the Norton on line purchase.
If any of those assumptions are wrong then please correct them.
But concentrate first on cleaning up the infected computer and the safest way is as indicated by BanMidou in this message since those are safe websites that are FREE and which have an excellent reputation for getting malware off your machine -- bleepingcomputer does tend to be very busy and so may be the slowest to be able to deal with your problem.
All thse sites insist for valid reasons that you do not at the same time try any instructions but theirs for your specific problem and don't try a solution that worked for other people.
Then when your machine is infection free I suggest you come back here and get the instructions on how best to install NIS cleanly -- there ae some steps you need to take to specially clean up after something goes wrong but we'll help you with those.
Also don't use the CD you purchased from WallyWorld even if you are going to use the KEY (is it for one PC or 3 PCs?) since the CD versions are the original version as released -- last fall since it is the 2011 version you say. We can give you a URL to a Norton site where you can download and save on your computer a one piece installation file that I've found runs more smoothly when you save it than if you try to upgrade or update from the website.
Would you also please tell us what version of Windows you are using on the infected computer including the service packs and whether it is 32 bit or 64 bit (you can see that if you press the WINNKEY and Pause keys at the same time and look on the System Information TAB that comes up.
When you come back we can also tell you how to contact Customer Support on line to get your purchase money refunded for the purchase you don't want to keep.
But get the machine clean first ....