I bought a second hand desktop yesterday. When I connect my DSL cable to the CPU, the system prompt: no driver found. Since this is a second hand, I don't have a cd for this pc. I'm confused. I really don't know what to do. The owner who sold me this informed me that he used this pc only with wireless connection with his usb type broadband. I don't have a wireless broadband and only using a dsl cable. Please help me fix my pc.