Tried a couple of days ago and gave up after 15 minutes on hold.
I think it's an issue with the laptop rather than the provider.
Sure? If it works fine on ethernet and on wireless to other providers there is something awry with that modem and it's wirelessability. What happens if you try and see which laptops can see each other over the home wireless network?
Also can you reset the modem - so that it forgets all the connections it has made to the other laptops and then try rebuilding it's list by powering up the blanked out laptop first. That'd show if it's a 3 is a crowd issue
And there's also the trick of forcing a new IP address for the laptop. Open a command prompt and enter ipconfig/release and then ipconfig/renew.
Or even better wait for wisdom of tel