This article was previously published under Q179590
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This article describes how to identify the version of Outlook Expressthat is installed on your computer.
To determine the version of Outlook Express that is installed on your computer, eitherlook at the information in the About Microsoft Outlook Express dialog boxor look at the properties of the Msimn.exe file as follows:
In Outlook Express
In Outlook Express, click About Microsoft Outlook Express on the Help menu.
In the About Microsoft Outlook Express dialog box, note the version number above the copyright notice.
Properties of the Msimn.exe File
Click Start, point to Find, and then click Files Or Folders.
In the Named box, type msimn.exe, and then click Find Now.
Right-click the Msimn.exe file, and then click Properties.
Click the Version tab. The version of Outlook Express is displayed in the File Version box.
For additional information about how to upgrade to the newest version of OutlookExpress, click the article number below to view the article in the Microsoft Knowledge Base:
171229 How to Add and Remove Internet Explorer Components
Microsoft Outlook Express 5.0, Microsoft Outlook Express 4.01, Microsoft Outlook Express 4.0, Microsoft Outlook Express 5.0, Microsoft Outlook Express 5.0, Microsoft Outlook Express 4.01, Microsoft Outlook Express 4.0