Thanks for all the suggestions so far. It looks as if the problem might be the drive not being partitioned.

John on Kansas - I couldn't find a "Device Manager" within Control Panel, but found System Information via the "Start Menu" [ Start - Programmes - Accessories - System Tools - System Information... ]. This gives me the "Microsoft Help" screen. In the section the "System Summary - Components - Storage - Disks" Gives me :-

Description        GENERIC IDE DISK TYPE47
Manufacturer        (Standard disk drives)
Model        IDE DISK TYPE47
Media Loaded        Yes
Media Type        Fixed hard disk media
Partitions        3
Size        28.63 GB (30,736,613,376 bytes)
Partition        Disk #0, Partition #0
Partition Size        12.18 GB (13,078,162,944 bytes)
Partition        Disk #0, Partition #1
Partition Size        13.41 GB (14,394,240,000 bytes)
Partition        Disk #0, Partition #2
Partition Size        3.03 GB (3,257,210,880 bytes)
        
Description        GENERIC IDE DISK TYPE80
Manufacturer        (Standard disk drives)
Model        IDE DISK TYPE80
Media Loaded        Yes
Media Type        Fixed hard disk media
Partitions        0
Size        114.50 GB (122,942,324,736 bytes)

                     **************************
I presume this tells me that it recognises that the second hard drive is there, but is not yet partitioned.

I'll post again when I have done some more checking of things.

Nutty - that link you gave seems to contain useful stuff - I will read it carefully before doing much else.
Quack
GtD.