Packet Tracer requires a valid Cisco Networking Academy login for unrestricted use.
Without a valid account, Packet Tracer can still be used via a guest login which limits the number of times that files can be saved. Logging in removes all save restrictions.
Creating an Account
If you do not have an account, please go to this location and sign up for the free Packet Tracer training course.
Link to Packet Tracer Self Paced Course
Here you will learn how to effectively use Packet Tracer and register for a netacad.com ID which in turn will allow you to register your copy of Packet Tracer for no cost and eliminate the save restriction in this copy of Packet Tracer. By getting a netacad.com ID, you will also be able to take other free courses available on netacad.com.