go to start>> programs >> accessories>> command prompt, most likely the default directory will be c:\documents and settings\yourname\
if you type "cd.." that will take you up a directory
so it will look like this c:\documents and settings\
type it again and it will be c:\
and if you want to change directorys you type "cd windows"
i used windows as a example folder name and you do the same again if you want to move into another folder obivously the name will be different and once you are in the folder which holds your program type the filename of the program in and hit return and thats it.