What model of Lenovo you have?
I can unlock:
E450, E460, E470, E570, E480, E570, E550, E560
L450, L460, L560
T440, T440s, T440p, T450, T450s, T450p, T460, T460s, , T470, T470s, T480, T480s,
T540, T540p, T550, T560, T570, T580
W540, W541, W550s
X240, X250, X260, X270, X280
X1 carbon gen2, 3, 4, 5, 6
Thinkpad Yoga 11e, 12, Yoga 260, Yoga 370, Yoga 460, X380 Yoga
X1 carbon gen6, X1 Yoga gen 3.