I followed the youtube guide. I downloaded the necessary files, the Android SDK, and all of that stuff. Then, I got to the bootloader, I transfered all the files, yatatata. However, when I was about to leave the TWPR thingy, it asked me if I wanted to root, and I clicked yes. What followed was a boot loop, so, I went into the thread about the boot loop, and got one of the system.img's from that thread, and proceeded to install that again. I can now see my internal memory and all of that, but from here, I am stuck. I cannot connect it to a pc again, and whenever I try to boot it up, it goes to a black backlit screen. I've stayed on this screen for a couple of minutes, but nothing happens, so I just turn it off and returns to the bootloader. I want to try another one of the system.img but I cannot get my computer to install the drivers or to find the device. It's under unspecified for some reason now.
Please help me!
EDIT: The issue seems to be that I now have ADB error 10
This device cannot start. (Code 10)
The specified request is not a valid operation for the target device.