Consider the following scenario. You have a PCI multiport serial adapter from Connect Tech, Inc. installed on a Windows Vista-based computer. You have a device connected to this PCI multiport serial adapter. In this scenario, a black exclamation point (!) on a yellow field appears next to the device in Device Manager.

Note: An exclamation point in Device Manager typically means that either the device or the device driver is installed incorrectly. Or, the device or the device driver is not working correctly.