Hi there! My name is***** am a computer professional with over 15 years of experience with both Mac and Windows computers, phones, tablets, and printers. It would be my pleasure to assist you with this. Can you try to scan something directly from the printer, and print it please? If there are still horizontal lines, then we have a hardware problem with the printer, and we can try troubleshooting the printer. If there are no lines on the print from the scan then there is a software issue on the computer. Please let me know the results so I will know what we need to do to resolve your issue. Thank you!