That's a new one on me. I've never, ever, seen it install Candy Crush Saga. I know they've been advertising it. Are you sure you didn't click on a link?
I unpin the store, Edge, and Media Player from the taskbar whenever I upgrade. I also turn off anything that reports back information to 'improve performance', 'enhance my experience', or 'improve marketing', turn off Cortana, and change the default browser to IE11. I also pin Chrome and IE to the taskbar.