I have an issue in my network!! I have around 10 windows 7 PCs and around 9 Windows Xp PCs..... since last week we have been getting on ONLY the XP machines (All of them) an error "Duplicate Name exist on the network" this happens every time any Windows XP machine is turn on or connected to our network. I have looked in the network to see if I find a duplicate machine but I didn't find anything!! I don't know what else it might be..... I have a Netgear firewall that is acting as a DHCP.... Do you think the firewall is the issue? Also, this is a network which is under a Domain network. What do yo think? do you have any other ideas on how to troubleshot this?