How to safely remove LAN?

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I'm a standalone user of this XP Pro (SP2) PC, with a simple broadband
connection via router. Networking remains a black art subject to me.
But a year or so ago my son installed a facility (LAN?) to allow me to
easily transfer data from my old PC to this one. I've long since
removed that cable and PC, which I no longer need.

So, to make occasional trouble-shooting of various problems easier,
and to potentially improve performance, can I now remove any
components of this LAN please?

I suspect this may not be a clear enough description, due to my
ignorance of this aspect, despite many years of fairly complex PC
usage. So I'll happily provide any other information if it helps,
including screenshots, service lists, Task Mgr details, etc.

If there's a more appropriate group, please advise.

--
Terry, East Grinstead, UK
.

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