If you want to reset all of your standard settings in Word, my first step would be to rename the normal template that sets the standards. To do this, go to C:\Users\<Username>\AppData\Roaming\Microsoft\Templates (Or C:\Documents and Settings\<Username>\Application Data\Microsoft\Templates if you're in XP) and change the file extension for Normal.dot and/or Normal.dotm to OLD. Close Word before you do this, and then re-open word afterwards and it will create a new file there. That should reset any custom margin settings or fonts that you had as the default.