Try resetting template.
To rename the global template file, follow these steps:
Exit all Office programs.
Click Start, click Run, type cmd, and then click OK.
Type the following command, as appropriate for the version of Word that you are running, and then press Enter:
Word 2002 and Word 2003:
ren %userprofile%\Application Data\Microsoft\Templates\Normal.dot OldNormal.dot
Word 2007 and Word 2010:
ren %userprofile%\Application Data\Microsoft\Templates\Normal.dotm OldNormal.dotm
Type exit, and then press Enter.
When you restart Word, a new global template (Normal.dot) is created that contains the Word default settings.