Connecting Remotely to a Computer

Hello, I'm attempting to remotely connect to a laptop running Vista, and I'm using XP. The problem is that (1) I don't know how to do it. And (2), She can't access the internet from her system. She has contacted her internet provider, and they have assured her that everything checks out on their end, but she still can't connect. She has received some root kit malware that has shut her down, and I was going to remotely download some software from my computer and send it to hers. Any help would be appreciated. Thanks!