An archive of repair files for HP hardware. Shared as “HP_20555_SH249HP,_Model_L1706,_HSTND.zip” — a .zip file, 71.2 KB.
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 @led_software. 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