How to disable port 445? You can easily disable port 445 on your computer. To do so follow these instructions: 1. Start Registry Editor (Regedit.exe). 2. Locate the following key in the registry: HKLM\System\CurrentControlSet\ Services\NetBT\Parameters 1. In the right-hand side of the window find an option called TransportBindName. 2. Double click that value, and then delete the default value, thus giving it a blank value. 1. Close the registry editor. 2. Reboot your computer. After rebooting open a command prompt and in it type netstat -an See that your computer no longer listens to port 445.