ok, got my tunnel back up and running again. even though there are still those network interface errors when I use ipconfig /renew6 or /release6.
One thing remaining. when Windows setup finally ran successfully, it removed some of the desktop icons which were linked to a junction (windows setup removed the non-default junctions). I thought I could go back and retrieve them from windows.old. but no windows.old was made after setup was finished. is it only windows 10 that does that, or does windows 7 keep those files elsewhere?