Teredo Tunneling Psuedo-Interface???

I ran a hardware diagnostics on my pc and got this message "A driver problem was detected on device "Teredo Tunneling Psuedo-Interface"
I was given the options to restore original driver or reinstall. I have no idea what this is or what to do. I do know that my system is running very slow these days and alot of my videos will play audio in windows media player but the picture will not show up. I am lost and have no idea what to do. Please help..... Lost and confused