I'm useing windows 2000 pro w/microsoft office 2000 and a Canon pixma MP170 printer. My problem is after first starting the computer it will print fine but after a couple of hours it won't print. I had it in for repair and they cleared the hard drive and reinstalled the operating system. It still does the same thing. It shows that its comunicateing with the printer but does'nt print. I hooked the printer to my laptop w/windows XP and have no problem printing. Any sugestions?