I don't have any of those devices so I'm guessing. The Samsung A8 is running Android so totally different CPU and, looking at the download page, I can't see a download for Android.
The Windows machines (I'm assuming intel cpus) may need putting into developer mode so that you can install third party software that isn't on the MS store. For W10 this link should show you how to get to developer mode
https://www.howtogeek.com/292914/what-is-developer-mode-in-windows-10/
You can try searching for something similar for W8.1 or better still upgrade to W10