Windows Media Center - never used it. I know there is free software to do the same thing. http://liliputing.com/2015/05/alternatives-to-windows-media-center.html
DVD playback - I use VLC.
Windows 7 desktop gadgets - I used the weather app but it has not worked for several months now. Still looking for a small lookalike replacement.
Windows Update automatically - I am guessing there would be an option to turn it off. If not graphical then a registry entry to do so.
floppy drive? cmon who uses any? My ‘old’ computer from 2010 did not have one and I never missed it.
Windows Live Essentials / OneDrive - never knew what it did.