If your PC is like any other windows PC it should have powershell installed. if you are trying to run it from a cmd line or batch script, no problem, you can put the word powershell in front of any command to have it run its through the cmd prompt console! first you should upload the file you want people to be downloading to drop box. then get a sharable link, replace the www.dropbox.com with dl.dropboxusercontent.com to create a direct link that wont require people to click a download button. then make a script like this:
start /MAX *drop box link*
timeout 3 >nul
powershell Expand-Archive C:\Users\%USERNAME%\Downloads\*file name* C:/
this will download the file and unzip it to the C:/ drive
it is simple and does exactly what it needs to do, does not work for .RAR files. I hope this solves your problem.