My N7 received the 5.0 update a few months ago. But I could never install it since it would die with the uninformative message Error! during the spinning Android open stomach phase. I gave up after a few tries and eventually the notification of the update disappeared.

Now 5.02 is waiting to be installed and again if I try, the same error occurs. My device is stock, not rooted and has nothing special on it.

I presume if I want Lollipop, I am going to have to do a full factory reset and see if the updates come again and failing that, flash the update from recovery.

Thoughts folks?