I also have colleagues around me having installed on Windows 7, 10 and Linux without any problem. And to be honest, I first tried to download the Windows app from the Arduino download page, but even if it is supposed to require Windows 8.1 or 10, when I enter the download page with my Windows 8.1 computer, the "Get the App" download button is not active and the following message is displayed :
"This app does not work on your device."
Very fun, given that I run Windows 8.1