How to connect to a remote Windows computer from an Ubuntu machine.

My girlfriend has several problems with her computer and she’d like me to scan it from my linux computer for viruses. I have her password, but i don’t know how to get her ip to send a connection request, nor do i know what protocol to use. Any help?
I know it’s supposed to be the samba protocol, and i have ettercap installed to get the IP (or better yet if anybody could tell me how to see one’s own IP on vista, so i don’t have to guess which connection is the right one) what i miss is the actual steps between the getting the applications and entering on the system. Mind you that i don’t want to access a shared folder, i need to access the whole thing, like you would with an ssh protocol on two linux computers (i do it all the time with my laptop, but it has ubuntu too)