So you know something about computers. And you have a friend who knows you know something about computers, and wants your help. I have good news for you!
If your friend's Internet connection is working, you can help him from the comfort or squalor of your own home. Both of the products below are free (the former for non-commercial use only) and so easy to set up that even your friend can do it.
(Note: When you run Crossloop, you're encouraged to log in or create an account, but you can look for the "skip" link to use it without creating an account.)