Important ~ First of all, turn off your Kindle Fire Wi-Fi before continue reading this. Secondly, use Root Explorer (if your Kindle Fire is already rooted) to check /cache folder. Make sure no bin file there. Delete it if found. Thanks Deric for the tips.

Amazon Kindle Fire has automatic software update feature. So you will get the latest software update on Kindle Fire automatically when a new software version comes out. This is good for normal users who don’t care about rooting and installing custom ROM on Kindle Fire. They can enjoy all the latest features and bugs fix on new software update. Take my Kindle Fire as example, my initial Kindle Fire software version is v6 when I boot up it for the very first time. And it got updated to v6.2 through over-the-air (OTA) method few hours later after I registered my Amazon account on it. Why disable Kindle Fire auto software update? Well, the latest Kindle Fire software update v6.2.1 breaks SuperOneClick rooting method. So you can’t root Kindle Fire on software v6.2.1 until developers come out a solution to root it again…