― Windows XP is a treasure of many invisible facilities and programs. Windows XP has an inbuilt CLI OS. And it is known as DOS(Disk Operating System).You have noticed many public places like Schools and libraries, or many other places the System administrators disable CMD.EXE for user level. But they forget to disable the older Version, “COMMAND.COM”. you can even use it. When trying to access CMD.EXE, if you are displayed with the following message: “The command prompt has been disabled by your [...].