The zip file was the same size as the original .exe. After downloading, I opened the zip file with 7-zip and extracted all the files. Now I need to start the installer with administrator privileges. It was a long path from .exe to the pdf-shuffler installer. It started at “C:\Program Files” but I don't see anything. I checked the permissions, but they look as zero. I checked the program's properties, and it asks for admin privileges. The only setting available was admin. I tried to run the installer again with administrator privileges and no problem was found. I also tried to run PDF-Shuffler with administrator privileges but the app failed. Furthermore, I guess that this is an issue for administrator. Furthermore, I was also getting the following error “Program could not be found” Why? A lot of my Windows system are running on Windows 10, but I have no problem with running pdf-shuffler on Windows 8 or 7. So maybe PDF-Shuffler worked perfectly with Windows 8 / 7 too. I've got lots of people who told me about this program, but I've never heard of it. It's really a nice software, so I decided that I had to try it. I ran the program from a Windows Vista, 7 or 8 computers. The “install” process was the same on each OS. But only when the application was started, PDF-Shuffler asked for admin privileges and I couldn't run the installer. I have followed the previous step, but when I tried to start the PDF shuffle from the menu, it tried to launch the Windows application even though it was a .exe. As soon as the program was launched, the program started downloading PDFs from net. I didn't understand that the program was trying to download, not to start when the “install” process started. After that, the application was stuck at the loading screen. When I launched the application again from the menu, it asked me for admin privileges, but I could do nothing. I started looking and found the answer. This explains why pdf-shuffler did not work. The programs that run from the menu are all “C:\Windows”. If the executable is in the same folder as that “C:\Windows”, the program can have no privileges as administrator. The program needs administrator privileges to get the “C:\Windows” folder. This explains why the .exe failed (that I downloaded from GitHub.