its only done this once before but under the shared bit it comes up with dell? what does this mean, it never usually does this?

It could mean that you are actually not on your home network but are connected to your neighbors instead. If you are using wireless this is easily possible.i dont have a dell nor does my family
but next door neighbours do across the street
does that mean that all the files im downloading on limewire are being received by them? if so, how can i stop this?
no my network isnt encrypted, i cant access theirs because it is password protected. reason for no encryption is that the range of the router would not reach where they are, or would be very limited, and therefore saw no threat.