"Marco Terzuoli" wrote in news:ybvOd.24663$ snipped-for-privacy@twister1.libero.it:
First you need to disable internet connection sharing on all computers, the routher is taking care of sharing the internet connection, not the computers. What is your default gateway set to on each computer? It should be the address of the router. Go to the command prompt on the computers and type "ipconfig /all" (without the quotes), you should have at least one address in the DNS Servers line.