Windows NT only:
A standalone laptop installation requires a local installation of the license manager and the MS Loopback adapter.
When your machine is on a network, TCP\IP finds the host name of your computer. If your computer is not on the network the MS Loopback adapter allows the license manager to find the local host name of your computer. If your computer is removed from the network, but does not have a MS Loopback adapter, the license manager will not be able to resolve the host name of your computer and will not be able to check out seats for your ArcGIS applications. Please see the topic on Setting up the MS LoopBack adapter.
Note: UNIX laptops do not require the MS Loopback adapter. Windows 2000 laptops should come with the Loopback adapter already installed.