RAR archive for the HP 15-r078tu laptop, tied to the Compal board LA-A994P according to the name. The contents are not listed, but a 2.93 MB package of this kind usually carries a BIOS dump, boardview or schematic for the motherboard. Compal uses the LA-xxxxP pattern for its laptop boards, so the code printed on the PCB is the most reliable reference. Extract it with 7-Zip or WinRAR, check what files are inside, and confirm the board number and revision before using any dump or drawing.
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 @hrtechno. 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.