To open an MS-DOS program from a command prompt window
Open Command Prompt
Type the name of the installed MS-DOS-based program you want to open, and then press ENTER. Or, change to the directory where the program is located and type its name there.
To open command prompt, click Start, point to All Programs, point to Accessories, and then click Command Prompt.
To switch between a full screen and a window, press ALT+ENTER.
To quit a command prompt session, type exit at the blinking cursor in the command prompt window.