If I'm happy with the product, I'd want all three trial computers to be under the same license.
On the Shopping Cart page, it says:
"Opt-out Trial: This special trial offer enables you to try your downloaded Norton product for a full 30 days for free. The 30 day trial begins once you complete this order for your product. After 30 days your credit or debit card will automatically be charged $64.99 (plus applicable taxes) without any additional action by you so that you can continue to use and be protected by your Norton product for an 11 month subscription period. To avoid being charged, simply cancel your Opt-out Trial order at any time before the 30 day free trial period ends by following the steps found here. If you decide to continue to use the product, the automatic charge will appear on your credit or debit card statement within approximately 3 days from the end of your 30 day trial."
So it would appear that after 30 days the trial product automatically rolls into being the actual purchased product. This led me to think that the trial itself has its own product key. (Are you saying that the trial download does not have its own unique product key? Then if the payment is automatic, when does the key get entered?) If the trial has a key, I'd want to know that it could be installed for trial on more than one computer before bothering with it.
If I'm happy with the product, I'd want all three trial computers to be under the same license.
As cgoldman says you can use that downloaded file as many times as you like so far as I know so in that sense it does not have a number of PCs attached to it -- although when I look in my Norton Account it is listed with No of Activations = 1 against all the entries I have for multiple trials.
cgoldman also refers to the trial downloads from the Norton website under Downloads at the top in the black bar but you can also download several of the Norton products from CNET Downloads and you do not have to use your credit card -- here's my boilerplate on this:
We heard from Norton Staff recently that you can download the 30 trial versions from CNET without any formality like the CC business apart from filling in your email address. And in case you are worried when you click on Download it takes you to a Norton download site, not to a third party site.
Whichever way you do it, you can buy your subscription from the Norton website (and when I checked the other day they had a special offer at $5 less and adding 12 months to the subscription not 11 months.
But very often it is much cheaper to look at the street price from reputable sources like the office equipment stores in the USA and reputable on-line sources since you can frequently buy the 3 PC product for about $30 at the most in the USA/CAN at the moment and I've seen the 5 PC version of NIS 2010 for $70 which is $14 per PC!
And if you spot the version you want in 2009 or 2010 the KEY will activate the 2010 product just the same.
..... nobody said it was going to be simple .... 