Step 1: Start Word, click File and then choose Options.

trust-center-settings.jpg
Screenshot by Rick Broida/CNET

Step 2: Click Trust Center and then Trust Center Options.

protected-view-disable.jpg
Screenshot by Rick Broida/CNET

Step 3: Click Protected View, then disable (uncheck) all three of the options listed there.

Step 4: Click OK and you're done!