RAR archive of 1022 KB labelled N5010 with an Intel tag, most likely schematic material for the Intel platform version of a Dell Inspiron N5010, though the brand is not stated in the name. The suffix (2) suggests a duplicate copy. Diagrams of this kind help trace power rails, locate components and check signals. Because N5010 boards existed for different platforms, confirm the board code and revision on the PCB match the document. Open with WinRAR or 7-Zip.
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 @generalschematics. 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.
7-ZipWinRARThe Unarchiver (macOS)