Powerpoint crashes when opened from DO

When i open powerpoint filesin DO, use a shortcut from DO or even open the powerpnt.exe, powerpoint crashes. this does not happen from windows explorer.
please help me.. I dont have a clue how to fix the problem.

Which versions of PowerPoint, Windows and Opus?

Which anti-virus and/or firewall software do you use?

[quote="leo"]Which versions of PowerPoint, Windows and Opus?

Which anti-virus and/or firewall software do you use?[/quote]
WinXP Professional SP 3
Powerpoint 2007
Directory Opus Portable 9.00.9
Avira Antivir
Windows Firewall

Opus 9.0.0.9 is over two years old.

Update to a more recent version if you want anyone to even consider helping you, else you're wasting your time and everyone else's.

If you have a valid licence for any 9.x version then you can update to the latest version free of charge.