TeamViewer is a simple,fast and secure remote control application.
You can use TeamViewer for the following scenarios:

Give ad-hoc remote support to colleagues, friends or customers.

Administer Windows server and workstations(you can configure
TeamViewer to run as a windows system service-so your computer is
reachable even before you are logged into Windows).

Share your desktop for Online-presentations or collaboration.

TeamViewer can communicate across firewall barriers and proxies
without any need for special configurations!

Click here for a free download of Software.