Quite a bit. I have a problem here. I have disabled Net-Bios completely by following all methods below and disabled netbios in services. After you disable the "Client for Microsoft Networks" option for a dial-up connection, the dial-up connection is still active on a Windows XP-based computer I have blocked Windows Operating System [SYSTEM] from accessing the internet with my Comodo firewall. No need for it to access the net. I have created two new rules to block port 137 & 139 in Comodo firewall. I run Peerblock, There are IP's that are trying to connect to me through port 137 Constantly, even after doing all the above, Peerblock has been Blocking these IP that are trying to connect to me through port 137. I have two Ethernet Ports on my motherboard and I am using both as Bridged in Windows 7. Why are IP's trying to connect to me through port 137? When I clearly disabled Net-Bios, Blocked Port 137 with Comodo but peerblock is catching them and blocking them. Why is my computer trying to accept calls on Port 137? May someone help me with this? Thank you.