When I open Word or Excel I get a window headed "Configuring Microsoft Office Professional Plus 2007" and a progress bar. When the progress bar completes, the app opens. That takes about a minute, maybe two. This was happening with Outlook too, and I had another problem with Outlook: it wouldn't Send. I ran Office setup and selected Repair. After that, Outlook would send messages and no longer did the Configuration thing, but Word and Excel still do.
I have, of course, googled the problem and read lots of proposed solutions, none of which seemed to work for anyone but the person offering the solution. So I'm hoping the Experts have something definitive.
This is happening on a Windows 10 Pro machine.