Edit- Seems like it didn't save my post for some reason.
So I wanted to go back to bone stock, unrooted to exchange the phone.
of note is that I did not re-flash any of the stock system or kernal, just a factory reset. I have previously deleted and renamed files, though currently nothing is renamed and everything is restored, though NFS and tetris do not function properly. I do not know if this is relevent to the below situation.
Did factory reset- successful
then entered ADB to remove su, busybox, and superuser.apk.
removed su and busybox, but not superuser, and exited, not realizing I could not later delete Superuser.apk without root.
Root disabled on phone, but SU icon still present.
Attempted re-root 4 times, and get the same hang up and freeze each time.
Gets to the point where it says "unlock phone and wait"
Unlock phone
"Wait 3 minutes...etc."
And then the phone freezes at the lock screen at this point, and I have to pull the battery.
It does go beyond this point at the cmd prompt, however, all the way to the end, where it sayus "attempting to install perm. files..." but then gives me
device not found (five times)
and brings me to the "hit any button screen"
Please advise.