In the last few weeks, Office applications have developed a strange, new behavior. It usually only happens on the first attempt to open a file after the program is opened.
Here is the sequence:
1. Invoke the "open file" dialog.
2. On the left there are icons for "My Recent Documents", "Desktop", "My documents", etc.
3. Click on Desktop.
4. The message "This feature is not installed. Would you like to install it now?"
I always click "No". Upon retrying the above sequence, the message no longer appears.
What is causing this behavior?