BackInfo
While attending Microsoft courses, most likely you would have seen the information details on the desktop wallpaper of the machine you are using. This is a tiny application called BackInfo.exe.
It is a very useful tool that enables you to visibly identify the computer that you are logged on to. See a sample pic below.
It’s part of the Windows Server System Reference Architecture Virtual Environments for Development and Test (WSSRA-VE) Deployment Kit. You can download the kit from the link below and after you install the deployment kit you'll find Backinfo in the \bld\utils directory. (http://www.microsoft.com/technet/itsolutions/wssra/ve/wssra-veintro_3.mspx)
Or to save you the hassle, download it here.
BgInfo
There is also another free tool called BgInfo by SysInternals (Bought over by Microsoft) at http://technet.microsoft.com/en-us/sysinternals/bb897557.aspx
It basically does the same thing. So, it’s up to you which UI you prefer :)
How to Install
1. Go to Run > gpedit.msc
2. Put the script under User Configuration > Windows Settings > Scripts (Logon/Logoff) > Logon
3. Add the link to the BackInfo.exe
* To prevent accidental deletion, one way is to put it under “C:\Program Files (x86)\backinfo\BackInfo.exe”