Ive read the rooting threads and the 8 reset trick to force a complete wipe and factory reset, but how to i pass the the wifi setup screens etc (oobe?) as it will just accept the pushed upgrade again.
***edit** after finding the right search terms for google I finally found the instructions here with pictures for anyone else wishing to know how to do this
techunsupport . wordpress. com
quick summary factory reboot power + N, N, N on welcome screen do either of the following
vol up + touch bottom right of screen factory screen button appears
vol down + touch bottom left of screen enable adp button appears
on factory screen vol up + touch bottom right of screen skip OOBE button appears