Why does my PCI/PXI serial card display the wrong serial number?

If you swap one PCI/PXI serial card for another of the exact same type, the serial number shown in the device manager and MAX may not change. This happens because Windows cannot distinguish the old hardware from the new. To fix this problem, delete the interface from the system and either scan for new hardware in the device manager or restart your computer. This forces Windows to reinstall your hardware, and the correct serial number should be displayed.