Root no more origin

I rooted my nexus one and also efficiently made use of a great deal of origin - just apps. Yet eventually all these applications quit working, claiming I do not have origin. Incurable emulator claims "approval refuted" for every little thing once more, as if I had not been origin. Yet opened lock is still revealed at start-up. Just how would certainly I deal with that? I do not intend to root once more, due to the fact that I will certainly need to do a huge back-up after that.