How to Change to a .Doc File Extension
- 1). Click on "Tools" on the menu bar and scroll down and select "Folder Options."
- 2). Hit the "View" tab and uncheck the box next to "Hide extension for known file types." Click "OK." This will enable you to see the file extensions you would like to change to .doc.
- 3). Right-click on the file that you would like to change to .doc. Scroll down and select "Rename." The file name will become a field where you are able to type. Change the file extension here. Hit the "Enter" key on your keyboard when you are finished renaming the file. You may get a warning from Windows that the file may not work correctly. Click out of this warning.
- 4). Open the file to check how it opens. If you have Word installed on your machine, the file should open as a Word document.
Source...