Open its internal webpage , login as admin and do this
No, reboot the printer and try another web browser
Log in as an administrator to the web interface by entering the printer's ip into your web browser. Then select system and follow the steps outlined above.
If you need to find the printer's IP address you can do that from the control panel on the printer under device>About in the network section.
Need to disable my startup page from printing every time. I put my ip address in browser and it gives me a Requested Operation cannot be processed error. How do I find out the admin user id and password from the actual printer? Don't remember setting one up.