You can try fixing this by
1. Close Outlook
2. Navigate to C:\Program Files\Common Files\Microsoft Shared\OFFICE12
3. Locate mso.dll and delete it. If it does not let you then reboot and do this before you open outlook.
4. Launch Outlook.
The MSI installer will launch it will run for a minute and then it will open Outlook.
or…you may need to uninstall patch KB2412171.
1. Open Add/Remove Programs
2. Click Show updates
3. Highlight KB2412171
4. Click Remove
Note you may have to follow the steps above and delete the mso.dll file.
Example of Event Log:
Event Type: Error
Event Source: Microsoft Office 12
Event Category: None
Event ID: 1000
Faulting application outlook.exe, version 12.0.6550.5003, stamp 4d10fbc4, faulting module sbamoutlook.dll, version 4.0.3907.0, stamp 4c9c0ffd, debug? 0, fault address 0x00019f2b.