How do I update the BIOS on the HP 255 G6?
To update the BIOS, first determine your current BIOS version, then download a BIOS update. The Setup Utility (BIOS) is started during the boot process and is covered in Chapter 7 of the manual. Details on determining the BIOS version and downloading an update are provided in the Updating Setup Utility (BIOS) section. (Page 77)
From the official HP 255 G6 Notebook PC manual, page 77
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