Command Promt Help needed

[unwashed potato!]

im trying to get to a file in 'program files' by using command prompt, but the first place it starts at is 'my documents' which is too far. anyone got a clue how i get to program files from here? or if there is any other command prompts that start higher up e.g. C drive?

the command prompt i found was by going to start, all accesories, accesories, command prompt, dont know if the helps at all