An HP computer is hardware.  Hardware can run many different softwares
(Office, of which PowerPoint is a part).  So the answer is probably no,
since it does not come automatically installed on all systems.

Do a search for 'PowerPnt.exe' on your computer (Start => Search => Files
and folders => Filename).  If it isn't there, than it isn't loaded on your
hardware.

What do you need to do?  In other words, do you need to watch a PowerPoint
presentation, or build/edit one?  You may be able to download the free
viewer and see a presentation.  However if you want to edit or create one,
you will need to download a trial of the full version or purchase it from a
store.