LogMe-In is a piece of software that you can have on your computer which allows you to access the computer from anywhere - assuming the computer is switched on.
Once logged in you have full access to the files etc. and can even open Word and type.
The words will appear on the screen of the remote computer [ the one with LogMe-In on.
In other words - complete control.
I have used this in the past.
I assume your friend doesn't have LogMe-In on his system?
What was the email suggesting ?