When accessing certain websites eg. e-bay the message "You are seeing this page because you are using a BT service which requires the use of BT DNS Servers and it appears that you are attempting to connect using a DNS server outside of our network." etc. Google chrome is OK but Firefox, IE and Microsoft edge displays this message. This problem appeared when BT Virus protect installed an update 2 weeks ago. Any suggestions would be appreciated BT technical help was of no use they just reset the router and said there must be a problem with my PC.