If you intend to remotely control an unattended computer or server, I would try out Teamviewer's new program Teamviewer Host. You most likely will no...
Desktop sharing is basically when you can view another computer's desktop and control it over the internet. If you are like me where everyone needs your assistance, this program will be very handy indeed. Whether grandma needs help or if you are in college, this is a lifesaver.
Go to http://www.teamviewer.com/download/index.aspx and download the version for the type of computer you are using. You will get the full version, the other person you will be helping out can get either the full or the QuickSupport version of the software. If at one point you think you will be using their computer to help someone out or if you think they will, they should get the full version.
Step 2: Installation
For windows users, Teamviewer supports Windows 98 and later, so if grandma is using an antique, she'll be just fine. The program is relatively small (only a few megabytes) so there is no need to worry about hard drive space. The full version will ask if you will use the program for personal use, commercial use, or both. The license costs money for commercial use. PLEASE BE HONEST. You will also notice an option for Teamviewer to start with windows. Do not do this unless you intend to be able to remotely control your own computer without another person running the program. This will also require a permanent access password which normally randomizes each time the program is opened.
For QuickSupport users, installation is not necessary. The program runs straight from the downloaded file. I would recommend saving the file for quicker access.