My Windows 7 laptop is connected to a wireless network, with the other computer running Windows XP. My laptop has detected and installed the printer on the wireless network (HP Photosmart C4600), and says it is Ready. However, it still won't print. The furthest I've gotten is when the status said 'spooling', then nothing. Printing a notepad document from my desktop gave me an Invalid Handle error, and printing in Chrome tells me there isn't a printer installed. Suggestions?