Need to fix my Hard drive?

Hi I have a compaq laptop and I have Tried to reformat because it would not boot into windows.It had windows xp professional sp2 installed on it. When reformatting, it would stop and give me the blue screen that said Stop, something about failure to load or unload or something and partmgr.sys . Now I have tried to reformat about five times now, and it doesnt even get into setup the last time i tried. but before that it kept giving me the same error message about partmgr.sys . Thank for any info