Been owner of SP3 for a month. No problem until today, used SP3 on many networks. No software changes done by me (OK, support guy put company email), possibly automatic updates. Today each effort to connect SP3 to internet completely blocks the internet in the house. Each other device on the network (both on 2.4GHZ and on 5GhZ) loses internet (connection to websites) in the moment Surface tries to connect. Tried switching from 2.4 to 5 with same results. Curiously, Viber and Skype continue working everywhere, on all devices (say 10 devices, computers, phones and tablets - Windows, Apple, Android). Even video-call works fine. All devices can see the router and the potential internet, but say "DNS error" and "limited connectivity". The ISP help desk measures the internet speed as normal at all this time. Getting the internet back is a tedious half-hour process involving turning OFF the router, the modem dozen times and even resetting the connection at ISP level calling their helpdesk on three occassions. Naturally the SP3 is kept away. Once the party is back on we try again SP3 to connect to internet - and start again. Past midnight we gave up on the SP3. There is definite software issue. Internet works fine with no Surface trying to connect. Please check it out. The ISP is known to use proxies. I have not touched the factory settings and the SP3 was bought in the country where the ISP is.