Edit solved it
I extruded part of the cube by putting a mask over it and held cntrl and moved it with the middle circle. My problem is I cant do it a second time when I hold cntrl click on the middle circle to move. any help would be great.
I was going to ask about this too, but after experimenting I discovered that you can only extrude when you have no subdivision levels.
Delete them and you should be fine.