Fell asleep before I saw your PM. If you're trying to install Superuser.apk and it's tell you it's already installed you might need to do a factory reset. I tested as many scenarios as I could and when I was stuck with Superuser.apk installed and no root I wasn't able to find a way to remove it. However, the factory reset worked in removing Superuser.apk. I did several factory resets and then followed my own guide. After the factory reset enter your google account information and follow the guide as the first thing you do. Factory Reset From the home screen hit the menu button Go to Settings Go to Privacy hit Factory data reset You will lose all your apps and settings and start fresh.