Article ID: 2770480 - View products that this article applies to.
If Microsoft Outlook 2013 is not running when you double-click an .msg file, an earlier version of Outlook opens.
This problem can occur if you have Outlook 2013 (as part of a Click-to-Run installation of Office 2013) installed on the same computer as an earlier version of Outlook. If you perform a software update on or repair your earlier version Office, the file associations on your computer may be reset to that particular version of Office. For example, the following registry data shows the .msg file name extension is associated with Outlook 2010.
To resolve this problem, follow these steps to reset your file associations:
For more information about Click-to-Run installations of Office 2013, please visit the following Microsoft web site:
Learn more about Click-to-Run
Most people that install Office 2013 will install Office by using Click-to-Run. Because Office 2013 Click-to-Run does not uninstall any previous Office versions, anyone who uses Office 2013 programs will be using them in a coexistence configuration. If you do not need the earlier version of Office installed on your computer and you are only using Office 2013 programs, you should consider uninstalling the earlier Office version.
Follow these steps to uninstall an earlier version of Office: