What does it mean when it has "...document is locked" and how do I unlock it?

If this only happens in one particular document, try clicking on Tools |
Unprotect Document. If all new and existing documents are locked for
editing, the problem is probably because you have not activated your
Word/Office software, or because you have an expired trial version of
Office 2003. What happens if you start Word and click on Help |
Activate Product? If you are already activated, a dialog box saying so
will appear. If you are not activated, the Activation Wizard will
start. If you have an expired trial version, a dialog box will prompt
you to enter a valid product key or purchase a key online.

John wrote:

> What does it mean when it has "...document is locked" and how do I unlock it?