Archive labelled for the ASUS X540UP notebook, 146 KB compressed, with no further detail about board number, revision or contents in the name. The size matches typical ASUS boardview files for this series, and a related X540UP boardview uses the 60NB0DE0-MB5010 board, but check what is actually inside before using it. Boardviews open in OpenBoardView or FlexBV and are used to locate components, check continuity of nets and find test points. Always match the board number and revision silkscreened on the PCB.
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.