problem with gateway

[el_rob3]

Hi guys,

i have network with many XP clients some timeswhen i found internet disconnection, when using some program to view the all connected PCs i found 2 gateways with the same IP but diffrent MAC.

therefore, by disconnecting some clients i found the infected PC.

i think it's not NIC problem cause this PC was worked good.

if it's a virus how can i deal with it and protect my network.

[AO3]

Install antivirus / spyware software and a firewall. Install a hardware firewall.