Zip archive named only after the Compal board number LA-L402P, with no brand, model or contents stated in the name. At 6.09 MB it may hold a schematic, boardview or firmware, so open it to see what is inside. Compal uses LA-xxxxP numbers for notebook boards it makes for HP, Dell, Lenovo, Acer and others, and the number is printed on the PCB. Match that number, and the revision if one is shown, before using any of the files to trace rails or replace components.
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 @notebookschematic. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip