ZIP archive holding a boardview for the ASUS S451 laptop, revision 2.0, with FZ as an extra marking in the name whose meaning is not stated. A boardview shows the component placement and net connections of the motherboard. Technicians use it to find parts, test points and power rails while measuring a short or a missing voltage. Open it with a viewer such as OpenBoardView or FlexBV, and first confirm that the revision printed on your PCB is 2.0.
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 @cynetitsolution. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip