You cannot run network related tools when an application uses serialized Network Driver Interface Specification (NDIS) miniport drivers
You have an application that uses serialized Network Driver Interface Specification (NDIS) miniport drivers. When you use the application on a computer that is running Windows Vista or Windows Server 2008, the application may crash. Therefore, the frozen application covers a part of the screen and locks the network controls of the operating system. In this situation, you cannot run network related tools, such as the Networking tab of the Task Manager or the Ipconfig tool.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB971060.