Having changed absolutely nothing on either printer or computer, it has decided out of the blue today it will not print. Eventually the canon utility pops up saying it's not responding. I suspect it's had it (perhaps it's wifi unit is kaput?) But just before I get it replaced, any suggestions? I've tried restoring factory settings on the printer and reinstalling the drivers on the computer and setting up again, but during setup it can't be found on the network and I can get no further.