Device Manager displays an exclamation point next to a device that is connected to a PCI multiport serial adapter on a Windows Vista-based computer

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.

Device Manager incorrectly reports problems with devices that are connected to the Connect Tech PCI multiport serial adapter. Microsoft has confirmed that this is a bug in Windows Vista. The devices that are connected to this adapter should function without error.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.