TightVNC is reasonably straightforward and runs in the background with absolutely no disturbance to the user. It is neatly buried in the taskbar and can be hovered over when the time comes that you need remote support. Being an older generation of software, it runs very light on resources and does not slow down any core processes within the operating system. Best of all, its FREE for personal and commercial use.

This software is very easy to use and simple.

Tight VNC is an awesome and free software which allows you to see and control a remote computer with your mouse and keyboard as if you were sitting in front of the computer yourself. This is great for working from home or telecommuting as you can basically do anything with the remote computer ...except get paper print outs from the printer connected to the remote machine. It's free to use for an unlimited time. The file size is small. It's safe and easy to install and from a company which regularly updates the software. The menu is simple and has everything laid out for you.