RAR archive covering the MSI MS-168X notebook board at revision 0A, around 1.46 MB. The X in the code likely stands for a family of variants, so check the exact board number printed on your PCB against the documents inside. The contents are not named, but such packages typically hold schematics and possibly boardview data. MSI uses MS-16xx codes for its laptops. Extract with WinRAR or 7-Zip and use the files for tracing rails, locating parts and narrowing down shorts or missing voltages.
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 @IT_SERVICE_WORLD. 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.