Dinosore,
Welcome to the pool!
I had a mighty struggle with Norton and their Product ID key, too. In my case the product ID was there, but the program would not accept the number. Calling Norton (Symantec) did not help because they would not take my call unless I agreed to pay them for the support. I choose to take the product back to the store and got a full refund.
I suggest you take the product back to the store and ask for a refund on the basis of the fact that it cannot be installed on your system due to the failure of the manufacturer to include the product key.
If the store is hesitant to refund your money, then I suggest you ask them to locate the product key in the software package. If they can locate it, you can accept the product and install it. If they cannot find it, then they should allow you to return the product for a full refund, or at least to exchange it for another product package. I suggest you open the package at the store to confirm the product key number is actually in the package.
By the way, in my opinion (IMO) I do not suggest Norton Anti-Virus or Norton Internet Security to anyone. In my opinion the product is attempting to do too much on your system. If any problems develop, no matter how small, your whole system is affected. I prefer to use smaller applications that do specific tasks;
Examples:
AVG AntiVirus (Free)
Free DownloadFirewall: ZoneAlarm (Free)
Choose Free Zone AlarmAnti-Spyware: (Free)
Remove SpywareAnti-Spyware (Free)
spybots - Search & DestroySpyware prevention (after you've removed them first) (Free)
Prevention ToolLearn about downloading and using Spybots and Ad-Aware: (Free)
Learn from RuthAbout Spyware (My Site) Also Free
My SiteI hope something here will help!
Dwight