[Kindle Fire Q&A, Help & Troubleshooting] brickboi:
Hey guys, I'm new here and I just registered. I have read almost EVERYTHING xda has to offer including the KF for Beginners, Bootloaders, etc. So I'm gonna cut right through the chase here.

* I TRIED to root my KF using KFU 0.9.6 and choosing option "[2] Install Permanent Root Using Superuser". got hung up on fastboot mode. I am sure that TWRP was not installed because it was supposed to be installed in fastboot mode, but when KFU told my KF to reboot for fastboot mode, the driver failed and I saw a little pop-up on the lower right hand corner of my computer saying that the device IS NOW unrecognized. From that moment I knew I was screwed.

* I am absolutely 100% sure that my Kindle Fire 6.3.1 is stuck in Fastboot Mode. (Because it shows the stock bootloader logo, (The "Kindle Fire logo and the backlight is very bright") and sometimes it shows up as "kindle" in Device Manager) There is no yellow triangle, just the plain "Kindle Fire" logo with a very bright backlight.

* Running "install_bat" from KFU did absolutely nothing for me. Yeah it got installed okay, but it still doesn't help my kindle to get recognized. (I installed the "install_bat" with my KF plugged out, my PC by the way is WinVista 32-bit)

* SOMETIMES when I plug in my kindle and get lucky, it becomes listed as Other Devices -> kindle (w/ a yellow exclamation mark next to it) but EVERYTIME that I update this "kindle" in Device Manager, I get a code 10 error saying that it did not install the "Android ADB Interface" properly. (Android ADB Interface because my KF is in fastboot mode.) BUT IT WILL STILL SHOW UP IN THE DEVICE MANAGER AS Android Phone -> Android ADB Interface (with a yellow exclamation mark next to it) and EVERYTIME that I try to uninstall the drivers, and check the checkbox that says "delete the driver software for this driver?", i plug out my my KF and when I plug it back in it says "Unknown Device", getting me back to square one.

* MOST OF THE TIME that I try to plug in and plug out my KF, somehow it's listed as Unknown Device (I tried updating the Unknown Device using the "android_winusb.inf" file but it says that it's not compatible)

* When I try to do the same steps on other PCs, I get the same annoying results.

* I ABSOLUTELY CANNOT get ADB to work. KFU always shows ADB Status: Offline, Boot Status: Unknown. Even though my KF is plugged in and the Device Manager lists it as "Android ADB Interface (w/ yellow exclamation mark)" It says it cannot detect the device. I'm wondering if it would really detect my KF because it is in fastboot mode. Will it still detect my KF even though it's stuck in fastboot mode and the "Android ADB Interface" has a yellow exclamation mark on it?

* NO MATTER how many times I tried to hard turn-off my KF, (15 secs. power button press) and reboot it again, plug in, plug out, restart my computer, download a fresh KFU0.9.6 from this website, install drivers, uninstall + delete drivers, install drivers, KFU still shows that my ADB Status is offline and my Boot Status is unknown. Is it really supposed to show it like that no matter how many tries I give it because my device is in fastboot mode?

* I know there is still a chance to unbrick my KF without the use of a "Factory Cable" or the Linux LiveUSB + Soupkit.

I know that this thread is pretty much closed and outdated but I still hope that there is someone there that can help me. Thanks in advance and more power to xda-developers.com!