In a recent post, I guide you how to root Kindle Fire and now I will guide you other method.

1. To get adb going you must already have the SDK on your machine and used it.Goto: %USERPROFILE%\.android and edit the adb_usb.ini and add following to the end of the file and save.
0x1949
2. Then go into where you have the SDK at and open the google-usb_driver folder and edit android_winusb.inf and add following to the [Google.NTx86] section and [Google.NTamd64] section.
;Kindle Fire
%SingleAdbInterface% = USB_Install, USB\VID_1949&PID_0006
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0006&MI_01
3. Save and Close
4. If you have already plugged your kindle into the usb you may have to open device manager and find “Kindle” under other devices and choose the android_winusb.inf file.
5. Turn on Installation of apps from unknown sources.
6. Open a Command Prompt and run adb kill-server then try adb devices. You should  see your device listed.
7. Download and install the Super-1-Click from here.
8. Click Root
loading...