Switching on one pc loses internet connection

  s99Raj 14:12 09 Mar 2007

A friend has two computers, one upstairs and one downstairs. His ISP is TalkTalk. I think the one upstairs is connected wirelessly via the router which is downstairs. When he's upstairs the Internet works fine with that one PROVIDED the one downstairs is switched off. As soon as the one downstairs is switched on, the modem lights start flashing and the Internet connection is lost.

Anyone any idea why? A different router gives the same problem as does a new PCI network card.

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