Here's my latest attempt. Uninstalled the software everywhere I could find it. Did an Error Check and then a defrag. Rebooted. Downloaded the software again. Disconnected the printer and reconnected it accoriding to instructions on the Quck Start poster that came with my printer. After installation, I did a manual test page, which printed out fine. I made sure the printer is listed as the default. But when I tried yet again to print from a computer file, yet again nothing happened. If I had a cd, I don't now. That's strange because I have the cd for my scanner,which is older than my printer. I also have cd's that came with my first computer, years ago. But no printer cd. There is still an explanation in front of the Printer Port in the DM, and the printer is still not listed there. The link you gave, grandms, didn't help, unfortunately. I will go to the hp site to locate the live person when I have the time to devote to it. I've spent so much time on this, my RL is slipping, and I have to catch up. Thanks to everyone who has tried so hard to help me. If any more ideas occur to anyone, just post it. I'll be checking back here, as I always do. I love this site. Dee

Yes a reinstall would be the first step. A basic Google search provided a link to the HP Forums regarding the recommended uninstall of your prior AIO. I have tagged it below. I also found this. You would have to decide if it is relevant to your concern. I read it as a possibility. http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=sj-32245-2&lc=en&dlc=en&cc=us&os=228&product=390315&sw_lang= DA Here is a link that might be useful: HP Forum

"I deleted all the files that I could that related to HP, drivers and all." And did you delete their corresponding registry keys? I bet you didn't. It's likely that simply installing the new driver would fix the problem because it would change the registry as needed. But the next time you have trouble (with HP or any other program), you should resist the urge to start deleting things. When the registry starts calling for files that aren't there because you accidentally deleted something important, you'll have more than enough error messages to keep you busy.

A shot in the dark here. It's an old HP fix-it. Shut down your system. Disconnect printer from system. Unplug printer from the wall for sixty seconds. (If it is plugged into a surge suppressor/power strip unplug it from the strip.) Reconnect printer to system. Plug printer back in directly to wall. Turn on printer and let it configure. Boot up system. Cross fingers. Print. The thought process is some HP transformers are fussy and don't like an unstable electrical supply; particularly through power strips/surge suppressors (two different things in actuality) In their fuss they can drop settings, handshakes and configurations. DA