A lock for an electronic device having a lock hole includes a lock core, a fastener, and an adapter, wherein the lock core is operable and rotatable about a first axis; the fastener is connected to the lock core and is shifted away from the first axis. The adapter is connected to the lock core and the fastener. The rotation of the lock core about the first axis drives the adapter to drive the fastener to rotate about a second axis, When the lock core is locked, the locked lock core restricts the fastener from rotating, when the lock core is unlocked, the fastener is operable to rotate.