Often when supporting a customer talking them through getting system information such as its name, IP address, or operating system version can be time consuming and frustrating.
BGInfo automatically displays relevant information about a Windows computer on the desktop’s background, such as the computer name, IP address, service pack version, and more.
You can edit any field as well as the font and background colors, and push it out to run in the your startup folder on each computer so that it runs every boot, or even configure it to display as the background for the logon screen.
Because BGInfo simply writes a new desktop bitmap and exits you don’t have to worry about it consuming system resources or interfering with other applications.
Download it from here http://download.sysinternals.com/Files/BgInfo.zip
A sample screen shot is shown below.