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Outlook will not open after Cloudmark DesktopOne is installed.


After installing Cloudmark DesktopOne, Outlook will not open, and you receive the following error: "Cannot start Microsoft Office Outlook. Cannot open the Outlook window. The file: C:\Users\(your user name)\AppData\Local\Microsoft\Outlook\Outlook.pst is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer."


To resolve this issue, please reboot the computer where Cloudmark DesktopOne is installed.

Last updated: 12/6/10

Applies To: