text: First open any folder, i.e. the one where your file is.\nThen click Tools menu then Folder Options. Then click View tab. In the Advanced Settings uncheck Hide extensions of known file types. Click OK.\nNow You can see extension of a file. Select it, pres F2 on Your keyb, change it to .doc.\n\nAnother way is by LEFT_SHIT+RIGHT_MOUSE_BUTTON an Open With option.\n\nI have polish version of Windows and tried to translate best I could - I'm pretty sure You'll figure it out anyway ;)