You have an (tray) application or driver uses the Shell_NotifyIcon API to trigger popup from Windows tray. The popup message may not be displayed to the user.
You may experience an issue where the above message is not displayed due to the device driver not being successfully installed and the following message will block the message:
"Device driver software was not successfully installed"
Article ID: 2701661 - Last Review: 12 Apr 2012 - Revision: 1