Will the machine move or is it stuck and won't move by turning the hand wheel? Remove the needle from the machine. Try moving the hand wheel toward you, don't force it, and see if there is some movement in the bobbin case. If there is a bit of movement pull up the latch on the case so you have something to hold on to, then move the hand wheel while pulling the case straight out. You may have to move the hand wheel back and forth a couple times but it will eventually let go.