Small plain-text note, only 152 bytes, whose name indicates instructions or a command for viewing the Windows product key stored on a machine. It is not tied to any specific motherboard or model. On modern laptops the OEM key usually lives in the ACPI MSDM table inside the BIOS, which is why a technician might want to read it before reflashing or replacing the firmware chip. Open it with any text editor, and review any command it contains before running it on a customer system.
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 @laptopdesktopbiosbin. Enginerys does not host this file.