Office 2007 Upgrade mapi32.Dll Errors When Launching Outlook

1. Click 'Start.' This is the circular button with the Windows logo.
2. Click 'Computer' and go to the C drive.
3. Navigate to 'Program Files,' then 'Common Files,' then 'System,' then 'MSMAPI' and then the '1033' folder.
4. Right-click the file 'Msmapi32.dll' and click 'Rename.'
5. Rename the file as 'Msmapi32.old.' This serves as a backup of the file.
6. Start Microsoft Outlook. When Outlook is started, one of the files it looks for is the 'Msmapi32.dll.' If Microsoft Outlook does not find the file, it repairs itself and recreates the file that's compatible with the current Outlook version. The error should no longer occur after this.