Documentation package for the MSI Megabook M660 laptop built on the MS-1057 board, compressed as a 539 KB RAR file. MS-10xx belongs to MSI older notebook board numbering. Expect a schematic useful for tracing the adapter input, battery charger, CPU and chipset supply rails, and for locating components behind a no-power or no-display fault. The revision is not stated in the name, so read the one printed on the PCB and compare it to the title block of the drawings before trusting 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 @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.