Hi,
Instead of using the recovery media which in your case does not work, you could perform a clean install of Windows 10 on the PC. I do not believe a BIOS downgrade will help. Here is a short guide on how to do this:
Download media creation tool from Microsoft on different PC, run and create a bootable pendrive with the OS on it. (there is an explanation on the Microsoft web page on how to create the pendrive). Create the drive with Windows 10 Home 64-bit edition. Windows will automatically activate once installed and connected to the Internet.
https://www.microsoft.com/en-us/software-download/windows10
If you choose this option you will need to use the pendrive to perform a clean install of Windows 10. You might need to disable fastboot and secure boot in BIOS (probably not). So, insert the pendrive in the PC and it should boot directly from the drive. If not, turn off PC by holding the power button. Press the power button and immediately keep pressing ESC until startup menu appears and then press F9 and choose the pendrive in the boot menu. Once it boots from pendrive follow the procedure to install Windows. At install Windows choose custom install and delete all partitions (or you can leave the recovery partition even though there are many other recovery options) You do not need a product key as it is in the firmware. Windows will automatically activate once installed and connected to the internet.
When finished installing allow Windows to completely update and find all or most drivers. You can follow this process by going into settings > Security and update > click on Verify for updates. You might need to reboot a couple of times. Once completely updated you can go into device manager and see if there are any missing drivers (there will be yellow exclamation mark next to the device). You can find these drivers and software on HP support page for your product.
https://support.hp.com/us-en/product/omen-by-hp-15-ce000-laptop-pc/15551437/model/17218626
I recommend installing HP support assistant which will help keep your drivers up to date and much more. You can download the latest version from here.
https://www8.hp.com/us/en/campaigns/hpsupportassistant/hpsupport.html
Hope it helps,
David
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