Remove old trial version of Norton product

I reinstalled my laptop back to factory settings Windows 7 64 bit I haven't used this laptop for about 5months so I will have alot of updating to do`There is a trial version that came with the laptop.when I remove the trial version and then download the newest version of Norton must I be hooked up to the internet to do this ? Do I run all the updates first before installing the latest version of Norton Internet with Security with backup  on to my laptop ?