What should I do if I am unable to print using a USB cable and software installation fails?
Remove the CD from the CD/DVD drive and disconnect the USB cable from the computer. Restart the computer. Insert the printer software CD in the CD/DVD drive and follow the on-screen instructions to install the printer software—do not connect the USB cable until instructed. After the installation finishes, restart the computer. If the problem persists with wireless connection, go to the Wireless networking section for more information.
From the official HP Officejet 4650 All-in-One Printer manual, page 3
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