Refresh all your devices before reconfiguring printer to connect to your computer.
a Shutdown computer
b Pull out printer power cord from the socket. Let it stay for at least 30 seconds then plug it back.
c Powercycle your router (unplug your router for at least 30 then plug it back. This will not change the settings of the router. This will just refresh the device)
d Once router is ready , put back brick at the back of the printer to turn it on
e Wait one minute
f Turn on computer
Repair your disk permission: http://bit.ly/OeD7U3
Run Cleanup tool http://bit.ly/vnukXY
Download updated driver from Lexmark website http://bit.ly/ToA1fo
Run firmware update http://bit.ly/AcNqbg