For anyone else who want to how to revert EVERYTHING (recovery + firmware) back to stock after they have installed cromi ROM and cwm recovery, here is how I did it: first u downloaded the cwm --4.7 recovery from droidbasement: and placed the recovery image where my fastboot.exe is located in android SDK folder: http://droidbasement.com/db-blog/?p=3260
Then I dowmaloaded the 4.3 ota update firmware also from droidbasement and paste it in root of sd card: http://droidbasement.com/db-blog/?p=3210
Now in cmd I executed the command for flashing the cwm recovery:
Fastboot flash recovery recovery.img
Now RCK button will be selected on ur tab go to it. U will launch the cwm recovery , now from here install zip and navigate to the ota 4.3 update u just downloaded from droidbasement.
It will install. When system reboots, I took and additional step of downloading the 4.3 ota from Asus site specific to My SKU and placed that in my root directory ( after first unzip). Delete the other 4.3 ota u had from droidbasment. Now restart our tab. U should get a new update notification when restarted. Install that new update. This will also erase ur cwm recovery and replace it with stock recovery. When update done. Go to settings . then backup and reset. And reset ur tab. Start out clean and ur done. Following this, now I'm on clean stock firmware with stock recovery and all previous bloat erased. I hope this helped others. Again, thank u very much sdbag for being there and helping me out with this.
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