VNCScan

VNCScan is a popular Network Administration tool that allows you to remotely manage all of your desktops and servers from a single location.
With VNCScan, you can remote control desktops, capture remote screen shots into thumbnails, execute scripts on remote computers, and do a TON of other time saving administrative tasks. VNCScan is like the Swiss Army Knife for anyone who manages computers on a network.
It uses the standard open source VNC utility for remote desktop control. In addition to this, it can perform many time saving functions on your Windows 2000 and better workstations and servers.The scripting features make it easy to customize the functionality more than any other product of its kind.

Features:
Support for UltraVNC 104 in Vista.
Strong UltraVNC encryption support.
VNC access while in safe mode.
Wizard driven VNC deployment.
Support for all major VNC distributions.
Include additional registry files with VNC deployment.
Multithreaded (super fast) VNC and RDP scanner.
Windows domain authentication.
Uninstall VNC Remotely.
Remotely change VNC passwords.
Full UltraVNC Encryption support. Thumbnail UltraVNC support.
Custom Command Line Support etc

Is a good way to manage a lot of computers from a single location.Have access and make modifications from your desk or from home to computers in other places .Set display and internet options ,set username and password if necessary.