Beginning with Office 2007, Microsoft unveiled a new file format, called Open XML, which uses the .docx extensionbut isn't compatible with older versions of Office without some assistance. Here ...

Those files have a “.docx” extension. Windows knows exactly what this is but, if you don’t have Microsoft Word installed, the operating system doesn’t know what program to open the file with.

Tired of Word docs you can't open with your older version of Office? Here are three free paths to total compatibility.

While admittedly it’s not as simple as it is on macOS to open a .docx file using Pages, here's how to open, edit and even re-export .pages files on a Windows PC.

Learn how to use a Microsoft 365 setting to choose whether to open files in the online or desktop app, giving you full control for each file.

If you are using Leopard or Snow Leopard, open a Terminal window, navigate to the location of the .docx file you wish to convert and enter textutil -convert doc myFile.docx (where myFile.docx is ...