Steve,
Thanks for your response. Yes, I installed already the Sp2. The message as
follows:
The selected file does not appear to be a valid Microsoft Office PowerPoint
file. It might be another kind of Microsoft Office System file or a file
created by using a different program.
Try double-clicking the file in Windows Explorer to see if another program
will open it. If PowerPoint opens again when you double-click the file in
Windows Explorer, it is possible that the file is not a PowerPoint file but
that its extension was renamed to be that of a registered PowerPoint file
type (such as .ppt, .pptx, .pps, .ppsx, .pptx, .pot, or .potx) but the file
is not a PowerPoint file.
To determine which program can open the file, try any of the following:
Contact the original author (if known) to find out which program was used to
create this file. Then rename the file with the correct extension so that it
can be opened by that program.
Try opening the file in other programs.
If you, or someone you know, are very knowledgeable about software, examine
the file header in a text editor to determine which program can read the file.
Another possibility is that the file was damaged during transfer from
another computer. If the file was transmitted over a modem, try
re-transmitting the file.
Lastly, the file might have become corrupted. If you have a backup copy of
the file, use it. It is not currently possible to reverse file corruption.
Regards,
Kelvin
