Often times I’ve seen where people attempting to follow troubleshooting instructions from a technical support department run into problems with the instructions. It may or may not always be the fault of the end user, but typically can be blamed on a lack of clear communication (or miscommunication).
Many times people fail to realize that the term “command prompt” loosely applies to two separate, but very similar utilities made by Microsoft; “CMD” (cmd.exe) and “command” (command.bat).
“Command” is the depreciated and no longer officially supported command line interface utility for Microsoft Windows. It made it for the last time into Windows XP’s distribution, however has been dropped from any inclusion into future windows releases, including the current Windows Vista and the upcoming Windows 7 Seven.
As seen in the screenshot below, launching “command” from the Start > Run menu brings up the below window.
The first line of the command line interface states Microsoft(R) Windows DOS.

Microsoft Windows command.com Utility. Please note if you are using a Microsoft Windows operating system newer than Microsoft Windows XP, you will get an error message when attempting to run "command" as the utility is no longer included newer windows distributions.
“Command” does not contain all the same logic that “CMD” does, and is limited with the functions, options, and commands that may be executed from within. Due to this, and “CMD” containing newer functions and options, “command” (command.bat) is considered depreciated.
Now, let’s take a look into the revamped “CMD”. Note the differences in the appearance of “command” (command.bat) and “CMD” (cmd.exe).
With the “CMD” (cmd.exe) command line interface window, the first line reads Microsoft Windows XP. (This of course will vary depending if you’re using Windows Server 2003, Windows Vista, Windows 7, etc, however the underlying utility, “CMD”, will function the same.) “CMD” was designed after command, but includes many new functions and features built into it’s logic. Functions that work in “CMD” will not necessarily work in the older depreciated “command”.

Microsoft Windows cmd.exe Utility as seen in a Windows XP Professional (updated up to service pack 3) environment.
Knowing now that there is a difference in “CMD” and “command”, hopefully you may save yourself some headaches caused by running a command from within the incorrect command line interface utility.
In an upcoming post I will dig into the basic commands built into “CMD” and their functions.