In the beginning when I connected the cables of a "HP Officejet 5610 All-in-One" to my computer (HP Pavilion 6000) with Ubuntu 16.04 LTS everything went just fine. I printed a lot stuff. But after a while I had to go to Windows 10 (same computer, dual boot) because the printer in Ubuntu stopped working. It was because of it that I even installed HPlip 3-16-7 and still Ubuntu does not even let me add a printer. It can't find or recognize any printer at all. Funny! I have another old computer with Zorin Lite 9 (based on Ubuntu 14.04 LTS) and it recognizes that printer. I am puzzled. What did I do or am I doing wrong ?? Was it because of some upgrade or update ?? I am looking forward to hearing from you if you can help me. Thanks.