Hard reset your modem - there should be a small black button somewhere, which will need a small nitting needle or similar, just a click for a couple of seconds. At the same time, reset your ISP modem - that'll be mounted on one of your inner walls, I would imagine. Now return to your laptop and reset the inernet button. Wait for it to settle down and log off and on again.
Why all this. It may not work, but it is a common disease. Your router (Live box) has misunderstood a new IP address from your laptop, and needs to reset itself again and exchange the info with the ISP. You may have to do it a couple of times over a few days , but it will eventually settle down again.
Hope it works for you!