Nexus 7 : Everything about...

Factory ROM's are unrooted roms made by Google. It will make your Nexus 7 feel like new. If you have rooted your Nexus 7 and applied different types of MODs and now you want to go back to how it was when you bought it, then you should read on... I will try to make this method as simple as possible for you to understand. This method is to be used with Windows. Your Nexus 7 bootloader should be unlocked.

Step 1: Download and Prepare Necessary Files
- Download Fastboot and ADB from here.
- Download Factory Image from here.
- Create a new folder called "Android" on C:\
- Extract all files in Fasboot and ADB.zip to C:\Android
- Extract all files from Factory Image to C:\Android

Step 2: Prepare you Nexus 7
- Make sure you have installed drivers for Nexus 7. If not, you can download and install them from here.
- Turn your nexus 7 off.
- Now press the Volume Down Button and Power button together untill you boot into the bootloader.
- Connect your Nexus 7 to PC using data cable.

Step 3: Flash the Factory Image.
- Using Run command start command prompt (cmd).
- Goto C:\Android
c:
cd\
cd Android

- Make sure that your Nexus 7 is connected in fastboot by typing
fastboot devices

- Now clean your Nexus 7 by using following commands in the correct order.
fastboot erase boot

fastboot erase cache

fastboot erase recovery

fastboot erase system

fastboot erase userdata

This will completely remove all your files and data, and will make your Nexus 7 CLEAN.

- Now flash the boot loader (change the filename if your extracted factory image contain different name).

fastboot flash bootloader bootloader-grouper-4.18.img

- Now reboot the bootloader

fastboot reboot-bootloader

- Now flash the factory Image (change the filename if your extracted factory image contain different name).

fastboot -w update image-nakasi-jdq39.zip

- DONE!!!!