I have a hewlet packard pc with xp home installed by manufacturer. no CD's came with the pc. Started having problems with pc, mouse not working and key board not responding. have had to recover system a couple of times. the last time I tried to recover the process stopped when windows was rebooting. now all i get is a window stating it needs a file from the xp Cd sisagp.sys the key board or mouse will not work. is there any way to get to the data on the hd to copy it.