Microsoft introduced the DOCX format, which ends with the extension .docx, in 2007 as an upgrade to its popular word-processing program, Word. DOCX files' incompatibility with earlier versions of Word ...

Q On two different new computers, I've created Word files and they're automatically saved with the extension ".docx." What is that? When I send these files via e-mail, no one can open them. Can you ...

Windows/Linux only: Firefox extension OpenXML Viewer opens Microsoft Word 2007 DOCX files directly in your Firefox browser. Granted, Gmail and Google just started converting DOCX files to HTML for ...

If you've been accustomed to opening files from newer versions of Microsoft Word in older versions of the software, the error messages you see when you try to open ...

The problem can occur when the Word file you are trying to open has a different file extension than the file you are attaching. It happens when you convert the file manually. There can be other ...