Changing the Windows NT Font?

I have a computer running NT 4.0 with service pack 6a. Everything was working perfectly and then the user came to me and said the font was looking weird. When I check the fonts folder it was empty and all the fonts on the entire computer are large and bold and look different than the default settings. Large fonts is Not selected. Is there a way that changes the font on the entire computer? What can I do to fix this problem?