Windows updates

I have purchased a Dell XPS 435 and upgraded to Windows 8.1.

I tried to contact a Dell tech regarding some update problems and ended up with click4support who said they were Dell techs. They could not solve my problem regarding Windows unable to install updates but after talking to a couple of their techs whom I allowed in my computer, I was told with Windows 8.1 I do not need to update as it was done automatically! Is this factual??

Thanks in advance,

John