How to root HTC One E8 Method Two

This is a GUI program built in Visual Studio 2013 using C# (C-Sharp) that takes advantage of ADB (Android Debug Bridge) and Fastboot commands and puts them into an easy to use toolkit that supports a multitude of Android devices.

Features

- Over 40 Phones Supported
- Beautiful MetroUI Theme
- Full Bootloader Unlock
- Flash Custom Recovery
- Gain Permanent Root
- Flash Custom Kernel
- Flash Custom ROM
- Push Files
- Install Apps
- Relock Bootloader
- and so much more!

Download

http://forum.xda-developers.com/devdb/project/dl/?id=9698&task=get

Unlock Bootloader

1. Open the WinDroid Universal Android Toolkit.
2. Download and install the ADB drivers if it prompts you to.
3. Choose your phone from the list. Wait a few moments while it downloads the correct recoveries.
4. Turn on your phone, go to Settings > Developer Options and Enable USB Debugging and plug it in. Then, if the toolkit does not recognize your phone immediately, click on the Refresh button in the bottom right corner.
   - If you are on Android 4.2.2 or above, and you do not see a button for Developer Options, you will need to go to Settings > About > Software Information > More and quickly tap on Build number multiple times until it tells you that Developer Options has been unlocked.

5.  Please follow the instructions for your corresponding phone. If your phone is not listed, follow the instructions under All Others

• AT&T One X
  - Click the button labeled Gain SuperCID in the Unlock Bootloader box. A command prompt will open and it will help your phone gain SuperCID. Once it finishes, follow the instructions under All Others.
• Droid DNA
  - Unfortunately, you can't unlock your bootloader through the toolkit due to Verizon's stupidity. The toolkit will link you to a proper unlocking method. You can utilize every other feature of the toolkit.
• Droid Incredible 4G LTE
• OnePlus One
  - Click the button labeled Unlock Bootloader. Your phone will reboot and it will confirm that you want to unlock. THIS WILL WIPE ALL OF YOUR DATA!Use the power buttons to scroll to Yes and confirm with the power button. Your bootloader is now unlocked! You can now skip to the Flash Custom Recovery section of the guide.
• Verizon M7/M8
  - Unfortunately, you can't unlock your bootloader through the toolkit due to Verizon's stupidity. The toolkit will link you to a proper unlocking method. You can utilize every other feature of the toolkit.
• All Others
  - Click the button labeled Get Token ID in the Unlock Bootloader box. This will reboot your phone into bootloader, retrieve your Token ID, and open a text file that contains your Token ID and further instructions.

6. Now that you have your Token ID, you can now submit it to HTCDev, which should have opened in the background when the text file opened previously. If it did not open, you can open the link here. Please login to your account or create and activate one with a valid email address. Once you have done that, go back to the HTCDev link, scroll to the bottom of the page, and paste the Token ID you were given in the previous step. Click Submit, and wait for the email from HTC on the email you created the HTCDev account with.

7.Once you have received the email from HTCDev, download the attached file in the email named unlock_code.bin. This is the unlock token that can unlock your, and only your, specific phone's Bootloader. Once it has successfully downloaded, click on the button named Unlock Bootloader. If your phone is not already in bootloader, this will reboot your phone into bootloader, and flash the unlock file you just got.A prompt will appear on your phone confirming if you would like to unlock your Bootloader. 

READ THE WARNING COMPLETELY! THIS WILL WIPE ALL OF THE DATA ON YOUR PHONE! 

Tap on Agree, press the Volume Up button once, and press the Power button once to accept it. Your phone will now restart.

How to Root the HTC One E8 Method One

I. Before You Begin

1. This will void the warranty of your device. We won’t be held responsible if you end-up bricking or damaging your device. Do it at your own risk.

2. This should flash a custom recovery as well.

3. This should only work on Windows based PCs.

4. You should have appropriate drivers installed on your PC. If you haven’t, 

5. You must have unlocked the bootloader of your device. You can do so from the HTCDev website.

II. Downloading Required Files

1. Download ADB and save it to your desktop.

ADB

2. Download TWRP Recovery and save it to your desktop.

TWRP Recovery (Download link’s available in the first post)

3. Download SuperSU and save it to your desktop.

SuperSU (Download link’s given in the first post)

III. Flashing a Custom Recovery on the HTC One E8

1. Extract files from ADB to your desktop by right-clicking on it and selecting Extract here.

2. Enable USB debugging on your device by heading to Menu > Settings > Developer options > USB debugging.

3. Plug in your device to your PC via USB cable.

4. Launch a Command Prompt Window on your desktop. To do that, simply hold down Shift and right-click on any blank area on your screen and select Open command window here.

5. Type in following command into the Command Prompt Window:

adb reboot-bootloader

6. Your device should reboot into bootloader mode.

7. Then issue the following command replacing filename.img with the actual name of the recovery image you have downloaded:

fastboot flash recovery filename.img

8. It should flash the recovery on your device.

9. Then, issue the following commands:

fastboot erase cache
fastboot reboot

10. Your device should reboot.

11. You’re done!

Great! Your HTC One E8 now has a custom recovery installed on it. Here’s how you can root your device:

IV. Rooting the HTC One E8

1. Connect your device to your PC via USB cable.

2. Copy SuperSU from your desktop over to the root of your SD card.

3. Open a Command Prompt Window on your desktop. To do so, simply hold down Shift and right-click on any empty area on your screen and select Open command window here.

4. Type in following command into the Command Prompt Window:

adb reboot recovery

5. Your device should reboot into recovery mode.

6. Tap on Install.

7. Select the SuperSU .zip file to be flashed on your device.

8. Tap on Swipe to Confirm Flash.

9. It’ll start flashing the file on your device.

10. When it’s done, reboot your device by tapping Reboot followed by System.

11. You’re now rooted!

Congrats! You’ve successfully rooted your HTC One E8. Your device now has root as well as a custom recovery that’ll help you flash a custom ROM on your device.

Please have a look to Method Two , should be much easier ...:-)