Can’t Print from one Desktop

When logged in on my desktop I can print anything. When my wife logs in on the same computer to her desktop, we can’t print anything. I’ve done the HP diagnostic all the way through and it concluded that I had a software problem. I went to MicroSoft’s online help and did their diagnostic, which is identical to HP’s. Same results. By the way, I am able to print a test page from my wife’s desktop but no other documents. I tried Word, Excel, Notepad, et. al. I think it’s a simple setting problem but the diagnostics took me through all the settings that usually cause these problems. Does anyone have an idea?