from the red hat web site did you notice that under "products" is listed
Red Hat Enterprise Linux
is mostly a server Operating System .It mostly works on most laptops but is intended for a rack mounted server
so installing it on a laptop is a "crap-shoot" , it might fully work,it might mostly work or it might not even install .
Also RHEL is not free .You MUST buy a support contract .
it you ARE going to use rhel you need to pay for it
also what is the hardware specifications on this "hp laptop"
Have you asked the reg hat support people if your laptop is compatible