- Start Windows Explorer.
- Locate and then open the following folder on your computer:
C:\Program Files\Common Files\System\Msmapi\1033
- Right-click the MSMapi32.dll file, and then click Rename.
Note The file (Msmapi32.dll) that you are renaming differs from the file (Mapi32.dll) that is mentioned in the error message.
- Type Msmapi32.old, and then press ENTER to rename the file.
- Start Outlook 2003.