I did attempt to re-instate the DNS backup file and it did not work, the new 192.etc address was still active on my system, I even re-booted the modem, no joy.
If living anywhere other than the US, changing this address may have some unintended consequences , for instance, I now cannot log onto the Australian Amazon site for my Ebooks as logging in defaults me to the US site with no way of changing it to the AU site. How do I fix this, does anyone have any ideas?