Installing ardour and installing in general...

I want to try out ardour, as I’m trying to turn my laptop into a fully functional music studio, using opensource software.

Ardour wants to downgrade a LOT of things on my computer, most of which I don’t know what is.Some of it I do know. Fx it wants to downgrade the Compiz interface or something like that. It also changes other things, fx media libraries. I can make do without Compiz. Thats ok. But I’d be very sad if Songbird stops working or if I can’t watch movies anymore.

So lets say I install Ardour and the whole computer goes to hell. I can’t watch movies or listen to music anymore. Will uninstalling it undo the downgrades?

Like will my system be restored to the state it was before the installation of Ardour?