Word font keeps changing? If Word does not remember preferred font settings, then you need to change default font or recreate Normal.dotm which retails defulat settings.

Launch Microsoft Word and open a new blank document. Click "Font" on the Format menu and then click the "Font" tab. Click the Font pull-down menu and select the name of the font you want to set as ...

Calibri replaced Times New Roman as the suite's default font in Office 2007, at a time before "Retina" displays and when 1024×768 and 1280×800 screens were still the norm —a ClearType font ...