A 47.8 KB RAR archive linked to Wistron mainboard 08530-1, first revision by the usual Wistron dash-digit convention. The file name states no laptop model or content type. Judging by size it most likely contains a small firmware image used to restore a corrupted EC or BIOS chip with a programmer. Since the -1 and -2 revisions of the same project may differ, confirm the marking on the PCB, read and keep the original chip data, and check the image size before flashing.
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 @schematicslaptop. 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.