microsoft teredo tunneling adapter, error code 10

The teredo tunneling adapter in windows 7 has error code 10 .
To get rid of this error, I followed instructions #8 of “microsoft teredo tunneling adapter has a driver problem”
However in my case it did not get rid of the error, instead it got rid of teredo tunneling adapter.
When I manually reinstated Teredo, the same error code 10 reappeared.
What can I do?

PS.The reason I want to have teredo working is that I cannot use Easy Connect in windows 7 (it is greyed out) I do not think that the router is the culprit, because my windows 8.1 laptop can use Easy Connect

Thanks in advance
gfheiche