Assuming this is a Photosmart 7550 printer and not the 7550 Plotter, this is what you will need for connectivity. To connect printer to PC, you will need a standard USB A/B cable... one side is a male A connector and the other one a male B connector. As far as the drivers are concerned, you will not need to download any. Vista already has a compatible driver for your HP Photosmart 7550. HP recommends selecting the drivers for the Deskjet 5550 when installing your Photosmart 7550.
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I need a USB cord to connect the cooling fan to my laptop.
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