Click on the link for the app you'd like to use, and you will see the relevant instructions for you to get set up for your subscription. MyIPTV is the client favorite, but ONLY works on Windows 10 and Xbox One. IPTV Smarters for Windows is the simplest to set up and use, but has the fewest features, and Perfect Player is the most complex, but also the most configurable. Both of these apps work on any version of Windows 7 and up.
There are other apps, notably Kodi, but clients have constant problems and complaints with Kodi in particular, so if you want to use it, you're on your own.