Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
I am sorry to hear that you are having such trouble. I will try my best to help you out and resolve the problem as quick as possible.
How is the Lexmark connected to the computer usb or wireless?
Apart from pdf are you able to print other documents like email and word?
right click on the Norton icon on the system tray bottom right and disable it and it will ask you to select the option select the till next reboot, once you download the file and access it reboot the computer and enable Norton again. This will solve the problem.