Most likely what's happening is that all the CRAPware (trial software) installed on the system is slowing it down. OEM computers always ship with a bunch of programs installed that people don't usually use. All those programs usually run at start up too, so assuming you even make it to the desktop, and one of the programs don't crash the system, its performance, including INTERNET will be bad. You could have FIOS and it wouldn't do you any good with all the software running on that new computer.
I could go on for a long time on how to optimize the OS for speed and it would take too long, so just google "how to speed up your computer" and you'll get a million hits...