1. Make sure you've installed SP1 for Office 2007
2. Run Diagnostics. It's in Office Button | PPT Options | Resources |
Diagnostics
3. Make sure you have a default printer driver (one that PPT likes)
installed. To do so, please follow this procedure:
How to install a TEST printer driver
http://www.pptfaq.com/FAQ00952.htm
4. It could be an issue with an add-in. If you go to Office Button | PPT
Options | Add-ins, what's listed?