I tried what you suggested. When I click on Change, I get a window saying that Windows is gathering the information needed. In Task Mgr, I see Windows Setup Bootstrapper start running. After about 15 seconds, it simply stops. Occasionally, I will see (not responding) in the window header.

I have tried repeatedly, rebooted, shut down all processes that might be eating up memory or other resources, but it's always the same.

This seems to be the same symptom that I get when I try to Insert Picture into a document. Other Word functions work, but sometimes Word actually freezes during Starting. I usually have to reboot the PC, and then it usually starts OK.