Sorry for confusion. The PC is up and running, but all my data is still on an external drive where I can't get at it. I tried the services of Iyogi - they could't work out why the windows restore would not restore a DSG file!
So i'm no further forward. I've tried MagicISO and WinImage both to no avail. It can't be that difficult, sadly I don't know anyone with a Mac - I'm nead Bedford if anyone is close?