Incompatible doesn't have to mean that it doesn't install or that it doesn't work at all.
It however does mean that there's no guarantee on what will work and not to be surprised if things that seem to work actual don't or don't fully.
E.G.: There's a fair chance you'll be able to install a PC game from '98 on your WIN 10. You might even be able to start it. However chances for it working properly are slim.
So yes, chances are that's the reason that FeatureWorks doesn't work for you.
Have a nice one
Thank you very much for your help