I am having the same problem. I am sure it is not being solved by cleaning the catridges. If you make a print test from within MS WORD and you select printing quality "draft", the shadow goes away. However, any other printing quality shows the shadow. This work around, however, will not work printing PDFs (for example from within Internet Explorer).
The solution from HP DID NOT WORK. Here's how I got around the problem. I was typing a Word document in Windows 10. When I got done I went to the HOME tab and highlighted all the text (select all). Then on the right hand side of the menu I selected the CHANGE STYLES drop down. (change styles has those two AA colored fonts). Then selected STYLE SET. Clicked on WORD 2003. POOF! PROBLEM SOLVED. Save the file.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".