Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.
Are you opening your command prompt by clicking on the actual file, or are you going to "Run > Type "cmd" ?" If you're running a file that's not what Need TOS stated, that might be the problem, you're running not the real command prompt but a fake / virus.
There is a really neat little program called Drop To DOS. It actually just installs a context menu addition so that when you click on any folder in Explorer there will be an option to open up a command box. Download this and try it out. Get back with your experience using this. I've been using it for years.