I think there is a misunderstanding here. If I understand it correctly, the 'preview' that the OP mentions is not the cell in Lightroom, it's a printer driver preview that comes up after you've pressed the 'Print' button. I don't use Windows so I can't check that, but that is why his statements are not contradictory.
One explanation might be that the original image is 'missing'. If you try to print a 'missing' image, the Print module will still show the image (because it shows the preview). However, when you do press the Print button, Lightroom will have to load the original in order to render it at the correct resolution and convert it to the printer color space. If the original is missing however, then perhaps this is what happens (I never tried that myself).