Had a laptop to repair today, blue screen of death as soon as the hard drive was accessed. Fired up the invaluable Hirens CD into hard drive diagnostics sure enough a quick test reported a fail.
It was a Toshiba L300 and naturally a Toshiba drive, seem to see a lot of them fail. Oh well looks like a new hard drive is needed.
Was odd though before the diagnostic program would read the drive had to be switched to compatibility mode in the BIOS.