No worries Gazz10,
I'm not going to try anything with this PC till sunday afternoon.
That way i'll have plenty of time to collect utils and ideas.
Hi Spud1966,
I've got a Ultimate Utility CD here.
i think I saw HDD regenerate listed on that, but I'll have a look for Hiren's BootCD too.
The partition wasn't formated, the owner has trouble working out which button starts it up, so formating is way to technical for him.

He got some sort of Virus or Trojan. AVG was poping up warnings, his desktop had turned white and it was running very slow. So he tried to reboot it ??? But he got a warning about 'Another user is still copying files' so he panicked pulled the plug.
It hasn't start since, it POST's then says it can't find an Operating System.
I booted it with an Ubuntu Live CD, C:\ was emtpty D:\ and E:\ were fine, then there was a new F:\ which had weird file and folder names.
Hence my geuss the Partition Table is messed up.