Nearly every day I have to remove and reinstall my workcentre 6515 for the first print session on both my and my daughters laptop. After I remove the printer reinstall and restart the computer it works for the entire print session, but when I leave my computer for a few hours or days I have to repeat the process to get it to work again. Any suggestions from others with the same problem? My printer and computers are all connected wirelessly. Oddly, I don't have this issue when printing from my iPad or my wifes Mac.