I've experienced this issue this weekend and I'm on Virgin Media.
3 laptops - Toshiba Sat Pro, Sony Vaio and a Dell Ultrabook.
The Tosh and Sony have been fine after update but the Dell refused point blank to connect to the wireless network. It could see the wireless networks (Virgin routers provide 2 networks, named 2G and 5G) but the only connection it would make was using Vodafone mobile (there's a 4G SIM in it).
Reboot of the laptop and restarting the router sorted it but it was confusing (and annoying) for those few minutes.
Biting the hand that feeds IT
