Read through this and if you still have questions post back.
With Windows 10 you can always rest assured the installation files are available from Microsoft as a bootable DVD or thumb drive image you can download for free even if somehow the HP recovery manager fails. But I encourage you to make an HP recovery thumb drive and store it away where you can always find it just in case you want to reinstall. The Omen has a lot of extra system software for the lighting and such that is not easy to find on this website so you are best off with a factory image.
If this is "the Answer" please click "Acept as Solution" to help others find it.