Please assist.

I have some apps that are uninstalling themselves. A user will have the app installed through Zen and for a few days they are fine but then they will log into the network in the morning and the application will uninstall itself. We check ConsoleOne and the user is still associated with the app and its not set to uninstall. Once the uninstall finishes we go back to our application folder in the start menu and click on the app and it begins to install.

Any help would be appreciated.