Have you tried 'Initialising' the keyboard and then formatting the disk. This sometimes works. Are both windows open, if so,you could try putting a small piece of sellotape over the righthand window at the back where you'll see the little 'open/
close' icons.

When I've been given a floppy with both windows open I've done this and it works. I would think the disk you're trying to copy is 'write protected' which the PC will accept but then it becomes 'Read only' which is why the keyboard is 'confused'.

Worth a try anyway.

Audrey