I want to format my friends computer because it doesn't start at all. I already tried the reintall win Xp but it only goes up to 6% and stops. I made a start up disk and the computer stars at the ms-dos and gives the promt (A:) but when I tried to use format C: it says bad command name or file name. Im able to change to C: and use dir to see the files. My cuestion is what could be wrong with the command format?