What is VNC ?
VNC (an abbreviation for Virtual Network Computing) is a great client/server software package allowing remote network access to graphical desktops. With VNC, you can access your machine from everywhere provided that your machine is connected to the Internet. VNC is free
TightVNC – Remote Tool
tightvnc remote desktop
TightVNC can …

TeamViwer – Free Remote Support Program
TeamViewer – the All-In-One Solution for Remote Access and Support over the Internet.  TeamViewer establishes connections to any PC or server all around the world within just a few seconds. You can remote control your partner’s PC as if you were sitting right in front …

Gbridge – Secure Share Tool

Gbridge is a free software that lets you sync folders, share files, chat and VNC securely and easily. It extends Google’s gtalk service to a collaboration VPN (Virtual Private Network) that connects your computers and your close friends’ computers directly and securely. Gbridge has many unique …

What program are you using to remote computer?  Is it secure enough? 
WallCooler
WallCooler Personal VPN makes remote working easier than ever: access remote files, applications or network resources from anywhere.
All Windows based applications are supported, no need to use special applications or synchronize files: MS Outlook, Remote printing, Windows File-Sharing, Windows Remote …

The Free remote support for Windows XP user “Remote Desktop Connection“ 
How to use “Remote Desktop Connection”?

Click “Start”, then click “All Programs” and then click “Accessories”
In the Accessories menu, click  ”Communications” and then click “Remote Desktop Connection”
In the Computer box, type the computer name of your host computer or “IP address”, which you wrote down earlier.

Click “Connect”
When …

Remote Desktop Connection is a free program including with Windows XP Professional, enables you to connect to your computer across the Internet and network from virtuallly any computer, Pocket PC, or Smartphone. So you can use  mouse and keyboard control everything.   This is a features good for support team too.
If you can’t use …

If you want to support another computer in your network without go there, Windows XP and Vista had been provide us program to support by remote called “Remote Desktop”
Once connected, Remote Desktop gives you mouse and keyboard control over your computer while showing you everything that’s happening on the screen.
How to …