Sometimes, when you try to open a Word file it fails to open and displays the following message – Word cannot open the file because the file format does not match the file extension.

1] Unblock the Word file Maybe the file is blocked, which is why Word cannot open the file; this usually occurs when you receive a file from Outlook or a similar email client.

When you first install Microsoft Word 2010, it automatically sets itself as the default program for handling Word documents. This means anytime you double-click a Word document from File Explorer ...