Yup, thought so. Thanks for that Milo - I don't intend to go back to the shop from which I bought it, they'll only charge me for re-installing it
and I think I can live without that.
One phrase in that Microsoft article caught my eye:
Any data present in a bad portion of the hard disk is usually lost and commonly associated with physical damage to the disk. This is most likely the result of high-vibration environments, such as the computer being struck, dropped, or kicked.
Now, who on earth would want to do that to a computer running Windows?
GG