I have had Windows Office 2007 installed on my Windows 8.1 machine for over a year now.
When I upgraded to Windows 10 all office functionality stopped. Double clicking on any office file gave the same message as double clicking on the main program file in the Office 12 folder

I can find the file but windows can't. I then uninstalled Office 2007 and reinstalled. No change. I repeated the installation. No change.
I rolled back to windows 8.1. Everything worked again perfectly. Under Win8.1 I uninstalled Office 2007. Then upgraded to Win 10 again and reinstalled Office. Still the same message.
All help I can find online refers to Win 7 and Office 2013 problems. Mine seems to be the only Win 8.1 and office 2007 problem.
Any suggestions for a fix will be greatly appreciated.