Hi, im running xp on

Question

hi, im running xp on hp compaq nx9110, power cable died and when i start it up giving me 4 options, safe mode, sm with networking, sm with command prompt. last known config or start windows normally, i have tried the last three but no joy, can you help. i cannot find cd copy of windows xp, so can re do it, i have been told you can automatically wipe the machine, how can do this without disk to get me up and running