I did the process again, the last time I used a company laptop, on my personal laptop. I used Winzip 8.1 in classic mode to open and extract files.
I downloaded Disk1, Disk2, Disk3, then used Winzip to open Disk 1, then clicked extract,another window opens, set path for folder A2(which I created for the files) ,Files: ALL, then clicked Extract.That placed all the files from Disk1.zip into the A2 folder.
I followed that same procedure with Disk2 and Disk3, folder A2 ended up with 44 files including setup.exe, which you now click on to start the install.
NOTE: You can not open Disk1.zip and click on setup.exe to install, nor can you use the install option, you must open each zip and extract the files into one folder. I understand its possible there may be a language issue that causes misunderstanding. You have to understand that the files in Disk1, 2 and 3 must be taken FROM the zip files and put into one folder. I aplogize for being redundant.
I create folders, A1, A2, A3 etc for just this kind of purpose, that way they are high on list in Windows Explorer so easy to find. You could create and name the folder what you want.