Epson CX6400 - Manual (Page 10)

10 Using Your Stylus CX6400
You see this screen:
3. Select Security Lock Off and click OK .
4. At the confirmation screen, click OK again and close the program. This
deactivates the security lock feature so that the Security Lock menu on the
CX6400 no longer appears. You now have full access to the CX6400.
Select off