how can i upgrade bios of the following system NUC 5PPYB VERSION: H76558-107 BIOS VERSION :PYBSWCEL.89A.0054.2016.0503.1546 OPERATING SYSTEM":MICROSOFT 10 HOME 64 BITS VERSION 1909

I do not believe you can, as it appears you have custom/oem bios.

However, the latest bios is here: https://downloadcenter.intel.com/download/29056?product=87740

Doc

You are right doesnot work

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