RAR archive of 182 KB labelled QT6, without any brand, model or document type in the name. Open it with WinRAR or 7-Zip to find out whether it holds a boardview, BIOS image or other service data. QT6 appears to be a project code, but which laptop or board it belongs to cannot be confirmed from the name alone. Check the identifier silkscreened on the PCB matches before relying on it, and if it turns out to be firmware, back up the original chip before writing anything.
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.