So, like some in here I was completely done over my MS this morning with 'update of death'. Was partly my own faulty. Hadn't done any restore points and didn't have any local admin accounts (0bviously have both now). Now rebuilt, ironically from my own SP3 recovery image that I have made available to others, but I can't get any insider builds anymore even though I have verified my account and fast ring builds are switched on. Any one else getting this ?