It will be to do with the file association for XLS.
Open Explorer
Tools | Folder Options
Click in File Types Tab
Scroll down to XLS in the list of file types
Click on Advanced
Click on Open and choose Edit
Untick the box "use DDE" and make sure the following is in the Application box:
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.