I’ve got a machine running xp here that just recently started giving me the message “disk read error, press ctrl + alt + delete to restart.” I tried to run the recovery console to repair the boot sector, but the only partition option I get is the h: drive, which is the recovery partition put in by hp, no c: drive. BIOS detects the hard drive fine, and there are no options in BIOS to change the bootable partition. But then I put in a copy of UBCD, and it could not detect the bootable partition either. At this point I am not sure what my options are other than attempt to reformat the disk, but I am hoping there is something else I can do.