If outlook 2003 wotn start and you get “The operation failed due to an installation problem” you need to do this:
1. Open Regedit
2. Backup your registry
3. Navigate to: HKEY_CURRENT_USERSoftwareMicrosoftOffice11.0Outlook
4. Right click on the Outlook folder and create a new DWORD. Set it’s value to Decimal (1).
Outlook should now start without issue.
