Asrock b450 pro4 bios update
Here is a quick how-to video about updating a Asrock b450 pro4 motherboard BIOS.
AMD Ryzen Build.
You can look at your motherboard manufacturers website for the bios update, specifically for your computer.
Follow the instructions given by the manufacturer and only try bios flashing at your own risk, only if you are confident of the firmware working.
note: I m not a technical person and don't know much about board level issues ...please get in touch with the respective motherboard manufacturer or the computer parts distributor for any issues regarding board level issues