Hi Hendrik
What do you mean by 'do not work properly'?
I would: update video card driver, update
printer driver (I know it sounds crazy but office 2007 is very dependant on
the local printer driver) and play with hardware graphics acceleration.
For an updated video card driver visit your video card manufacturer's
website
How to install a local printer driver
http://pptfaq.com/FAQ00605.htm
How to set graphics hardware acceleration back (operating system)
http://www.pptfaq.com/FAQ00129.htm
And try turning it on & off in PowerPoint
Slide Show -> Set Up Show -> untick 'Use hardware graphics acceleration'
Lucy
PS You're in the Mac group - if the problem persists you would be better off
posting in the PC group: microsoft.public.powerpoint or
http://www.microsoft.com/office/com...?dg=microsoft.public.powerpoint&lang=en&cr=US