I've seen some posts where one or a couple of these problems have arisen but not all simultaneously. The trash is there somewhere because I can delete but only via finder. The dock however cannot be coaxed back into existence and I can't activate any of the desktop icons by clicking on them. I also can't minimise the windows - the red and green buttons work fine but the yellow (although there and blinks when clicked) doesn't have any effect. Any help gratefully received.