If you’re unsure, share your motherboard model and current BIOS version, and I can give model-specific steps.
Write these down.
Here’s a concise guide to updating your BIOS using American Megatrends (AMI) firmware, which is common on many motherboards (e.g., ASUS, ASRock, Gigabyte, MSI, and prebuilts like Acer or Lenovo). american megatrends update bios