What I need to know is if the wireless transmission from the router is, in some way, overriding the ethernet connection. That's why I suggested that you go into the router setup, disable the wireless output and then try your tests on the two machines using ethernet cables for both.
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Do you know that we're all in line for succession to the throne? Really?
Well, if forty-eight million, two hundred thousand, seven hundred and one people died I'd be Queen.