ZIP archive tied to the ASUS K54LY notebook, motherboard revision 2.1, 6.30 MB in size. The name does not specify the contents, so it may hold a schematic, boardview, BIOS or board photos, and you should open it to see what is included. Material of this kind helps with tracing power rails, identifying components and restoring firmware on the K54LY. Before relying on any of it, compare the revision printed on your board with 2.1, since ASUS revisions can change layout and component values.
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 @azvoltagemap. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.