My Amd ryzen 7 5800X does not work with my pc

I recently bought a 5800x Cpu and it currently doesn't work when I install it into my computer, I have managed to deduct that the problem is with the bios and not the power supply. but here is the problem my pc is a prebuilt HP Pavilion Gaming Desktop PC TG01-1000a, and there is no way I have found to update the bios. please help I don't want to have to return the Cpu I bought.