If using a laptop, ensure it is plugged in and the battery is at 100%.
Restart your PC and tap F2 or Del to enter BIOS. Note your current version. If the link you found offers the same version, do not re-flash it.
If you cannot find a brand name on the case, use software to pull the "System Manufacturer" and "BaseBoard Product" info:
You are upgrading to a newer generation processor that the current BIOS doesn't recognize.
While a BIOS update shouldn't touch your files, it is best practice to back up critical data beforehand.
To find the official BIOS download, you should look for the rather than the motherboard ID.
Below is a comprehensive guide on how to locate the BIOS, why you might need it, and the safest way to perform an update. Understanding the GBDW1VERBD Motherboard
Type wmic baseboard get product,Manufacturer,version,serialnumber and press Enter.