Hi, you need to start Internet explorer, then log into your router page, (example NETGEAR Support Home Page)
Then go in the settings and change the router internet port MAC address last digit up or down by one value.
Then update the change and log out and close the webpage.
Then switch off the computer, modem and router.
Then restart the modem - router then computer.
You should be connected on the web with a new IP address.
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