Amazon recently updated its firmware to allow for mirroring with a Windows 8.1 computer. Here we provide step by step instructions to do so with your own computer. See our video at the bottom of the screen for a demonstration.
Step 1. Press the home button on the Fire TV remote
Step 2. Select Mirroring
Step 3. On your Windows 8.1 Laptop move your cursor to the upper right hand corner and select devices.
Step 6. Allow your computer to find your Fire TV device or add it by clicking the (+)
Step 7. Select your Fire TV
Step 8. Your Fire TV should begin mirroring your PC
How to Mirror a Windows 8.1 computer on Amazon Fire TV