Windows 7 is my favorite OS, period. Also, I like any version of Linux that comes with KDE Plasma 5.
Oh, XFCE. That explains a lot. Try this: https://cybergnomer.wordpress.com/2014/11/01/enable-system-sounds-in-xfce/amp/
I personally don't like XFCE at all. As I said above, KDE Plasma 5 is my current favorite Linux desktop, with Gnome 3 probably my least favorite.
And for the old computers with low memory.
I just don't like the overall look of XFCE.