Archive labelled as a fix for an HP 820, most likely an EliteBook 820, though the generation is not stated, so match it carefully to the board before use. The 8.79 MB ZIP probably holds a repaired or modified BIOS image for a specific fault, which the name does not describe. Inspect the contents first, compare the model and board number, and flash with an SPI programmer only after saving a full read of the original chip and checking the image size against the chip.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosfilebins. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →