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Moving a NIC to another PCMCIA slot, or to another PCI slot, without uninstalling the device can cause Windows to believe there are two network connections still using the same IP. To clear up the conflict, you must uninstall the old NIC reference from Win2k Device Manager. From a command-prompt window, type the following commands:
The first command instructs Device Manager to show orphaned devices. The second command launches Device Manager. From Device Manager's menu bar, select the View menu and choose Show Hidden Devices. Expand the Network Adapter option and delete the unused adapter.