The simplest way to replace all your Wingding checkboxes (assuming they show as using the Wingdings font when you select one) with the real deal is to insert a content control checkbox into the document (e.g. replacing the first Wingding checkbox with the content control checkbox), then copy that to the clipboard and use Find/Replace, where:
Find:Font = Wingdings
Replace = ^c

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]