Hello @Riegel
Thank you for posting in the HP Support forum.
I am afraid you have provided too little information to be able to assist you effectively and with concrete steps. The error you get makes me believe you run a business class PC with preboot authentication enabled/disk encrypted. For some reason, the encryption preboot file system and boot loader are corrupted. In such cases, the encryption may be removed. Particularly, to remove it the PC needs to be reimaged/reinstalled. If your computer is still with active warranty, send it to HP for assistance.
Here is more info:
>> https://support.hp.com/us-en/document/c00372730
>> https://support.hp.com/us-en/contact-hp
Please, provide your feedback and don't hesitate to post back if you face difficulties.
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*** HP employee *** I express personal opinion only *** Joined the Community in 2013