Hi there @Moore95,
Welcome to the HP Support Community! I moved your post so that both of them were together for me to answer you properly. I understand that you are receiving an error message that says "Selected boot image did not authenticate..." also.
I had given instructions on another thread. You had replied to the troubleshooting steps on that thread, stating that you have tried to do a hard reset twice and that the answer to my questions was no. Due to this information, I would suggest that you please try to do a BIOS reset.
Can you get to the BIOS Menu to be able to do a Hardware Test? It is important that you try and do a hardware test on your Notebook to help diagnose where the issue is coming from.
Do you have any CD's in the Notebook? If so, please remove them and try restarting your Notebook again. Same with anything that is externally connected to the Notebook. Please unplug all of those devices and then try restarting your Notebook again.
The LED's for your Caps Lock and Num Lock functions do not blink at all when you push the power on?
Do you see anything when you try to power the Notebook on?
What happens when you tried booting into Safe Mode?
One of my questions was whether or not there were Recovery Discs created before this had happened (generally when you purchase the Notebook). If you did not, you would need recovery media to perform a system recovery.
Other than that, you could try to disable secure boot and enable legacy boot in the BIOS.
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If you require further assistance, I would be more than happy to continue to help you. Please re-post with the results of the troubleshooting.
Thanks!
Have a great day!