Not able to flash/factory reset Galaxy Nexus.; restores to one particular backup every reboot My Galaxy Nexus will not factory reset. I tried to flash many images. I deleted the gallery contacts, but it restores to a restore point on each reboot.

Currently, it is having "yakju-jzo54k". I am getting an OTA update. After downloading and updating, it is going to recovery mode with red caution sign. Then, it reboots after sometime. Again, a restore point is restored (with my old pics and contacts). 

I tried Wug's Nexus toolkit, flashing it with a rooted boot.img, and deleting many files. Still, the old backup was still restored. 

It's became a big headache now. So, any help is appreciated.
It seems that either your recovery is broken, or the OTA update did not download correctly and the data is unable to be recovered. I would recommend starting anew, perhaps by installing a CyanogenMod ROM so that way you are running the latest Android (4.4.2). Head over to XDA and find the instructions for the type of gnex you have (GSM, Sprint, Verizon).