Systems now come with system restore disks or ways to make system restore disks. They put the same things back on. The only way to get a perfectly clean version of the OS is to buy the retail OS and that's paying for it twice.
Last year in this forum I had read something related to Dell laptops about doing a clean sweep of the factory installed OS and reinstalling because of all the extra junk that is normally added on at the factory.
Is this considered still necessary and if so, how hard is it to do and how much time does it take?