actually, i don't think you need to remove anything. underneath the big window that shows all the networking components you have installed (NIC, protocols, transport layers, etc), is a window which shows a single line & also has a pull-down button. punch the button to get a list of options to select & choose "windows login". this will use your windows login to log into your network. if you have a windows password you'll still be asked for it, but if you set your password to blank then it won't. you should be able to clear your password (if it's set) from "users" in control panel.
hope this helps,
joe