which netgear router are you using? What do the logs say for your connections? Test--- under run: \\computer name of a pc you on your network open a dos session type: arp -a what does it say? Does it see the IP of the PC your connected to or now? Does it see your default gateway IP? What happens when you type: ipconfig /flushdns on the PC giving you problems not being seen on the network? does this command work or do you get an error?