Tiny 1.05 KB RAR archive associated with Wistron board 08628-1, where the trailing digit generally marks revision one. The name gives no model, chip or content type, and the size is too small for a BIOS image, suggesting a small EEPROM dump or note. Extract it and inspect the data before use. If it is meant for a serial EEPROM, confirm the chip type and size, check the board number on the PCB, and read out the original chip before writing new data.
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.
7-ZipWinRARThe Unarchiver (macOS)