An archive of repair files for Lenovo hardware (board NM-E901). Shared as “Eletro-X_KS480 KS580 NM-E901 (REV 1.0).zip” — a .zip file, 9.38 MB.
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 @Satale_bios_esquemas_Laptop. 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