Hi, My name is Eric Moyers. I am a Network Support Engineer in the Cisco Small Business Support Center. Since you do not have access to the GUI of the switch, you can also use the reset button on the bottom left hand corner on the front of the switch. Using a paper-clip you can push in and hold the reset for about 35-40 secs. Then your device should be reset back to factory.
Eric Moyers
Cisco Network Support Engineer
1-866-606-1866