ERROR: Outdated Intel 13th or 14th Generation BIOS

If you are receiving the below error message, it is strongly recommended that you update your BIOS to resolve a known issue with your CPU. Intel offers instructions for this procedure here.

Error Message

Our game has detected your computer is using an Intel 13th or 14th generation processor that does not have the proper updates installed to address potential processor instability issues. It is highly recommended to update the BIOS on your motherboard to the latest version with Intel's microcode 0x12B or later.

If you would like more information on this issue, Wowhead has an article here.