It's not the "Symbol" font per say that I'm having trouble with, it's more the fact that any punctuation used to write a formula such as !@#$%^&*()_+<>,.? (which are displayed just fine here) just don't under the MatchCAD interface. Only the letters and the numbers are O.K.(see atttached file in the original post). I work with several under programs and MS Office software and never have any issues with any of my fonts. When in MathCAD, using ANY font (arial, times new roman, etc.) I get the same problem. Changing the keyboard settings to american english, canadian english, french canadian, etc. does not solve the problem. Changed the user regional & language settings, still useless...I'm using Windows XP so there should not be issues with the O/S. Should I try re-installing? Thanks for the reply by the way.