Your 2 computers are in same workgroup, same subnet? and crossover connection? PC1 = IP: 192.168.0.1 -------- Subnet: 255.255.255.0 -------- Gateway: 192.168.0.2 -------- Workgroup: Workgroup PC2 = IP: 192.168.0.2 -------- Subnet: 255.255.255.0 -------- Gateway: 192.168.0.1 -------- Workgroup: Workgroup (Sorry for my English, and too simple suggession)