http://i.imgur.com/RkNWQWn.jpg
Can anyone tell me about these issues in my PC since I cannot find the Teredo thing?
have you googled? What is the Teredo Tunneling Pseudo-Interface
https://en.wikipedia.org/wiki/Teredo_tunneling
http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/teredo-tunneling-pseudo-interface-this-device/757db042-c91e-464c-b963-c1f442fdf925?auth=1
Here is the result (sorry for late response :/):
You need to install the drivers and make sure they are working correctly.