[John1]

A-ha,
a glimmer of light is emerging,
so the unit remembers the last device ??

Is that it?
maybe switching it off then on ... introduces a new device ??
It does something .....
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No wait a mo,
you said 'account information',
so this info is at the far end (from me) of the cable connection ?
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Anyway,
as this friend would like to use his XP occasionally on my cable,
i would prefer to 'take turns' with it rather than have another PC
on my little network.

So as "nffc" mentioned earlier,
it is possible to make the MAC addresses the same.

This i think would solve my minor network issues,
if we can alter the Mac address of the XP machine,
so its the same as my router,
then i think that should cover it.

Mind you - i dunno either of the addresses !!!