Exit Word (and Outlook if it is running). Use the Search feature in Windows
(Windows key + F) to locate normal.dot. Be sure to search hidden files and
folders. Rename the file when you find it.
However, renaming normal.dot doesn't fix issues with existing documents;
these must be taken care of separately. For example, assuming that you
created the footnote properly, copying document contents, except for the
final paragraph mark (¶), into a new blank document might fix the issue.
Note that you can show/hide paragraph marks as well as other nonprinting
marks by pressing Ctrl+Shift+8.