Hello, it is appears to be maybe a problem with your memory, or with your BIOS:
https://support.hp.com/ee-en/document/bph07107
Do you have make a BIOS update, or modify your memory?? The best option for beginning is remove your RAM, clean it and reinsert it module by module.
If you need help for open your PC please tell us the Product Number (P/N) from your PC.
If you need help for find this please check this document: https://support.hp.com/us-en/document/c03754824
If I have been answer to your question please accept it as a solution
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