What should I do if I cannot print a test page and the Windows software installation fails?
Remove the CD and disconnect the USB cable, restart the computer, and temporarily disable any software firewall and close any anti-virus software. Then insert the printer software CD and follow the on-screen instructions to reinstall, making sure not to connect the USB cable until prompted. After installation finishes, restart the computer. (Page 2)
From the official HP Deskjet 2050 All IN One Printer Series J5 manual, page 2
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