Generic archive named All In one, roughly 9.2 MB in RAR format, which gives no brand, model or board number. The name may refer to an all-in-one PC or simply to a bundle of mixed files, so the contents must be checked before any use. Identify the motherboard number and revision printed on the PCB and compare them against each file inside. If firmware images are present, back up the existing flash chip with a programmer and make sure the image size matches the chip before writing.
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 @biositechyangiyer. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.