Cannot access address book from Word 2007

When opening my address book in Word 2007 to copy in an address, I get the message "Either there is no default mail client or the current mail client cannot fulfill the messaging request.."

This has worked repeatedly in the past. I have no problem using the address book in Outlook and Outlook is the default mail client.

I recently installed the free upgrade from Windows 7 Pro to Windows 10, but cannot remember if the last time my address book worked correctly was before or after I upgraded.

Thanks in advance for your help.

The Resolution shown on this page: https://support.microsoft.com/en-us/kb/905421 solved my problem. The instructions are for a different version of Windows, but it not hard to translate it to Windows 10.

I set Outlook to be the default for all files it could open, and my problem was solved.