Section 2: Installing TWRP
1. Download and install Minimal ADB and Fastboot from here:
http://forum.xda-developers.com/showthread.php?t=2317790. If you already did this in section 0, you don't have to do it again.
2. Download the latest TWRP .img file from here:
https://www.androidfilehost.com/?w=files&flid=39562
NOTE: The TWRP file that you download should have a .img extension. Make sure you can see this. If you don't see .img at the end of the filename, Google how to make file extensions visible on your version of Windows and do it. If you do not do this, you may run into trouble later.
3. Download and install the Motorola Device Manager from here:
https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/88481. If you already did this in section 0, you don't have to do it again.
3. Rename the file that you downloaded in step 2 to TWRP.img
4. Copy TWRP.img to the directory that you installed Minimal ADB and Fastboot to. The default location on an installation of 64-bit Windows is C:\Program Files (x86)\Minimal ADB and Fastboot.
5. Turn off your phone.
6. Hold the volume down button and press the power button to boot into bootloader mode. You should see a green android lying on his back with his chest open, and some information about your phone. Poor little guy...
7. Plug your phone into your PC.
8. Double click on the Minimal ADB and Fastboot shortcut that's on your desktop. It will open a command prompt.
9. Type "fastboot devices" without quotes and press enter. If it gives you your phone's serial number, you're good to go. If it gives you nothing, your device is not detected. This can happen for several reasons, and I won't discuss them here. However, if you followed these directions and all of your hardware is functioning properly, you should be good to go.
10. Type "fastboot flash recovery TWRP.img" without quotes and press enter. It should tell you that the flash was successful. You might see some "not found" errors. These are normal and can be ignored.
11. Highlight "Recovery mode" on your phone using the volume up and down buttons.
12. Press the power button to boot into TWRP.
13. TWRP will boot, and it will ask you if you want to allow write access to the system partition. IT IS VERY IMPORTANT THAT YOU ALLOW THIS. Check the box that says to never ask this question again.
14. Select Reboot, followed by System to boot the phone normally.