Outlook requires Outlook Express 4.01

Cannot start Microsoft Outlook. Outlook requires Microsoft Outlook Express 4.01 or greater. You can install Outlook Express by running Add/Remove Programs from the Control Panel. You could try searching Microsoft's knowledge-base, only to find the solutions apply to Windows 2000. And Outlook Express is installed and running just fine and you're running Windows XP! So, what to do? Read on for some resolutions to this issue.

Instructions

Click Start>Run>type regedit and hit Enter. Navigate to the following registry key:  

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{44BBAB40-CC51-11CF-AAFA-00AA00B6015C}.

Highlight the registry key and then locate the REG_DWORD values is Installed under Microsoft Outlook Express 6 and Mail News. If either of the values are set to 0, change them to 1. To do this, right click on the REG_DWORD values and select Modify. In the Value Data form field, enter 1 and click OK. Close out regedit and start Outlook.

Download POP3 or IMAP mailboxes (including SSL) to Exchange Server.

But wait! I have the registry key {44BBAB40-CC51-11CF-AAFA-00AA00B6015C} but it's in a folder called AutorunsDisabled listed at the bottom of Installed Components. Good; this step applies to you then. Download and install the program Autoruns listed in the resources section (or if you ran Autoruns, run it again).

Locate the file Autoruns.zip. Right-click the file and then click "Extract All..." and save the file in the default location. Click the "Extract" button. The Autoruns folder opens. Double-click Autoruns.exe. Click "Run." Now, locate the registry key mentioned in Step 1. Place a check next to each entry of Outlook. Close out of Autoruns and double-click on your Outlook icon to start Outlook.

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