Presumably you have Adobe Acrobat Pro or something such installed and you're using that for the PDF print driver.

Have you tried repairing the Office installation (via Start > Windows Control Panel > Programs > Programs & Features > Microsoft Office (version) > Change > Repair)?

Have you tried uninstalling/reinstalling your PDF print driver software?

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