Sorry i can't help you. Im having a similar problem. One machine on the network, laptop, can see and connect and share files with all others, but none of them can even connect to the laptop. Neither can they ping the IP of the laptop, but laptop can ping all others. Same result whether Ethernet or wireless, Static or dynamic IP. I noted 2 differences in the setting from ipconfig /all, IP routing and WINS Proxy are both enabled, only on the laptop. I tried have checked / changed registry settings, but they have had no effect. I have searched through my programs and removed any i don't use, don't recognize. I wonder what these settings are for you?
