Of Course your new machine came with Norton 360
I don't know how familiar with new systems you are, but of course your machine came with 360. THEY WANT TO SELL IT!!!
All machines come with the freebies and trials that load up your system with the newest and greatest (they say). Most of the stuff is a 30, 60, or 90 day trial at the end of which you have gotten used to it and either go into a major panic thinking you need it and better buy it rather than finding another one. It's all sales BS. Come on now you have to see that. Do you think you need all the "free" internet freebie trials too? SALES SALES SALES.
That is why Microsoft changes the OP system rather than fixing what they have BUCKS BABY!!!