Forget all the mumbo jumbo about recovery and all this.
The problem with Black Screen after HP Logo and spinning circles is the graphics driver. Gets corrupted after flashing to new bios somehow. Don't ask it just does.
Get into Safe Mode. Open up Device Manager disable the graphics card. Then boot normally in to windows
Go to Windows Update and tick on the Download Optional Drivers. Scroll to INTEL Graphics Driver tick on that then install. Make sure you have no other installs. DO THIS SEPARATELY. Hardware drivers should always be installed by themselves.
If there is update pending for a reboot to install do that first make sure that all Windows updates are done then install this driver.
This worked for me. Nothing like older versions of Windows where everything is simpler. This new antiquate mess creates a bigger headache. Mystery!!
Back to basics. You get a black screen after HP Logo and spinning, but the Monitor is illumed --backlight function and boots into windows drive lights flashing and all including CAPSLOCK, problem is video card.
Forget the recovery modes, the bios rollbacks, and countless hoo ha non-sense. Just a way for them to make money.
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