You should have a link, possibly in the start menu, under HP, or else a way to access it when you first turn on the machine, something like "Press [X] to enter recovery Mode" or something similar.
Reading up on your machine with the supplied documentation as well as visiting the HP website for additional documentation *and* registering your machine will be beneficial to you in the long run - these types of things you really should know - now- *before* something catastrophic has a chance to occur.
Trust me, it sucks to have something go south on you, only to find out later on that now you can't do jack, because you didn't do something as simple as make a recovery disc, or something like that....