Which Version of Windows Do You Use?
It’s easy to change your default email client at any time. You’ll find the settings in Windows. But, before you begin, check to see which Windows version you have. Changing the default email settings is different in different versions of Windows.
Set the Default Email Client in Windows 10
Use Windows Settings from the Start menu to change the default email client to Outlook in Windows 10.
Add an Outlook.com Email to Windows 10
With Windows 10, you may no longer have access to Outlook Express. Fortunately, Windows 10 has a built-in email client called Mail. To add your Outlook.com email (or any email) to Windows Mail:
Set the Default Email Program in Windows 8
Make changes in Windows 8 from the Control Panel.
Set the Default Email Program in Windows 7
Find the Default Programs window from the Start menu to change the default email client to Outlook in Windows 7.