Originally Posted by elias.acab
Before I flashed my first rom, I backed up the stock OS, and I still have it. If I wanted to flash it back onto my phone, can I just use the ClockworkMod recovery and choose restore? I know after that it will still have an unlocked bootloader and will be rooted, but I just wanna know if I need to use RUU to flash the stock rom which I still have because I backed it up.
I am assuming you made the backup of the stock with ClockworkMod.
Yes, you can restore it and do not have to RUU and you will be fine. Most likely you have fastboot flashed a new boot.img when you installed the new Rom. If you are S-on a restore will not be able to change your boot.img back.
You will need to fastboot flash the backup's boot.img.
This is why it is good to have your backup on your pc. When you open that backup file on your pc, you will see the boot.img file that you need to flash.
If you have changed your recovery or updated it you most likely will have to flash the recovery that made the backup.
The exceptions to the rule would be something like: Maximus HD, where you would need to downgrade your firmware, clear storage in bootloader when you have the stock recovery installed. Reinstall your custom recovery and restore your backup.