A lock for computer security has housing comprising a bottom wall, at least one side wall and a front wall with a corner region defined adjacent to both the bottom wall and the at least one side wall. A combination-based locking assembly comprises a locking assembly body holding at least two locking elements including a main locking element and a movable locking element, both said locking elements being supported by the locking assembly body, and the main locking element extending from and away from the locking assembly body at the front wall of the lock housing. A driver is coupled to the movable locking element, configured to selectively move the movable locking element in frontwise and rearwise directions, and controlled by a locking mechanism. The locking assembly is secured to the housing at the corner region thereof, with the locking elements located directly adjacent both the bottom wall and the at least one side wall. A key-based lock enables overriding the combination-based locking assembly to unlock the movable locking element even while the combination lock is in a locked state.