Error: Cannot start Microsoft Outlook. Outlook requires Outlook Express 4.01 or greater
Cause: Incorrect settings in the registry
Solution: SUMMARY
This article describes about an error MS Outlook requires Outlook Express 4 or greater, after upgrading to Vista in Outlook 2002.
Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following link in the iYogi Knowledge Base:
How to back up and restore the registry in Windows
Click Start and then click Start Search
Type Regedit and then press Enter
Locate the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed
Components\{44BBA840-CC51-11CF-AAFA-00AA00B6015C}
On the right pane double click IsInstalled key and change the value to 1 from 0
Click Ok
Close the Registry Editor
Restart the Computer
