we bought 2 computers apples from our library-every time i try to log on to one it says need to locate macintosh manager server to use-then must enter mac manager or submit administer password-we have none of these-we didn't get any cds with these-can you tell me what to do-the other computer run but all of a sudden it won't start up- is there a button on it to restart or what- we ask the library for passwords and everything else but they say they know nothing about them-someone came in and disabled them or something. thanks if you can help any-