These were probably saved as "PowerPoint 97-2003 and 95" format.
Your best bet is to find a copy of PPT 2003 and use that to open the files.
Then save as simply "PowerPoint Presentation." This is the 97-2003 format --
it's the "and 95" part that's the killer here.
Once you install 2003, if it has SP3 installed also, then you'll need the
information here
http://www.pptfaq.com/FAQ00916.htm to be able to open and
save these files in 2003 SP3.
--
Echo
"(E-Mail Removed)" <(E-Mail Removed)> wrote in
message
news:704dbc59-8745-4a1f-956c-(E-Mail Removed)...
> I have a problem with some old ppt-files (probably 2000 and 2003)
> which I cannot open in new Powerpoint releases (2007/2010) anymore. I
> guess that the files are not corrupt but it is a downward
> compatibility problem.
>
> How can I convert those files in the new format?
> Is there any procedure that converts files within in my archive folder
> structure into the new format?