Can't log into yahoo mail

I have a hp laptop running windows 7. I use Norton 360 for security. The last few weeks when i try to log onto yahoo mail,after the page comes up briefly,I get redirected to a page that says "Internet Explorer cannot display the web page ". This happens about 75 percent of the time. It only happens when logging into mail and not other yahoo services...ie...fantasy football.It won't happen if I go to fantasy football first then access email from there.I was looking at Norton 360 firewall activities under Security history and noticed under alert summay it said "Protecting your connection to a newly detected network on adapter "Teredo Tunneling Pseudo-Interface" (IP Address 2001::4137:9e76:30c6:1e7c:3f57:fe96). Under "Recommended Actions" it says No action required. Under the Advanced Details for Actions it says "No actions available for this item." Under Severity is says Info with a blue dot. Is this whats causing the problem? Is "Teredo Tunneling Pseudo-Interface" considered a virus? If not...and I'm thinking it isn't...what is it's legitimate purpose? Is this something that is in the control panel that I can just disable? Thanks in advance for any help you can send my way.

 

I disabled the adapter and everything seems fine for now. I also disabled the 6to4 adapter....should I have done this? I did this because i googled how to disable the Teredo Tunneling Pseudo-Interface and it said to disable the 6to4 adapter too.I also went back and looked at the available adapters in the device manager and noticed Teredo Tunneling Pseudo-Interface is no longer listed. I know I only disabled it and not delete or uninstall. Is this normal? Thank you for your help and quick response.

 

Great...problem resolved then by disabling the adapters...thanks again for the help.

 

Well the same thing is happening to me again. I downloaded IE9 beta today to see if that would help but it didn't. Can Teredo Tunneling Pseudo-Interface be uninstalled? When I try to disable it,it just comes right back to enabled.Could there be another promblem? I am experiencing this problem on another web site too,so its no longer just yahoo. Thanks