I was able to get the flashing window to stop using the registry settings posted by Andreas Nordås on Oct 12 2022. This Microsoft Knowledgebase article contains detailed steps on how to do that.I had the same problem. If you want to get rid of Outlook Express completely, you will manually need to remove the program files related to Outlook Express. These steps will remove Outlook Express from the desktop and start menu. If you ever want to reinstall Outlook Express, follow the same steps, but check the checkbox instead of clearing it and Outlook Express will be reinstalled. There is no need to restart the computer, from now on Outlook Express will no longer be present on your desktop and in your Start menu. Wait for the wizard to complete and then click Finish.

Clear the checkbox in front of Outlook Express, and click the Next button.In the Windows Components Wizard, scroll down until you see Outlook Express.In the Add or Remove Programs window, click the Add/Remove Windows Components iscon in the left-hand side of the window.In the Control Panel, select Add or Remove Programs.Open the Windows Control Panel from the Start menu.Follow the steps below to remove Outlook Express: Since Outlook Express is part of the Windows XP system software, you will not find Outlook Express in the list of programs that can be removed.

In case you prefer to use an alternative email client, or have upgraded to Microsoft Outlook as part of the Office suite, you can uninstall Outlook Express. Outlook Express is installed by default in Windows XP, and is the default email client.

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