Remote Desktop is a great Windows feature that lets you control another PC from your own computer, or vise versa. Vista cannot be controlled by another PC by default, meaning that you have to enable this feature to allow others to remotely access your PC.
This service is quite secure and is great for allowing another user to virtually fix a problem when hands on access isn't available. However, I wouldn't enable this service unless you need to allow remote access.
To enable Remote Desktop, load up the system overview panel by pressing WINDOWS KEY + PAUSE/BREAK. Then, click on Remote Settings:
Now, select Allow connections from computers running any version of Remote Desktop and click OK:
You can now connect to this PC from any other Windows PC over a network or the internet. To learn how to do this, read one of our other remote desktop tutorials.