Okay, since people are having issues with the manual methods for Windows, I'm going to recommend installing using the Android SDK. @myusernam3, please remove the code from the OP and the other thread and replace it with a link to this post.
DISCLAIMER: Please read this post 4 times over before you attempt this procedure. It may render your phone unusable (read: a brick) if you don't follow it correctly. I and anyone else associated with this exploit is not responsible for any issues that may arise from this process, such as if you brick your phone. Proceed at your own risk, and with extreme caution. This procedure is not for those who don't want to take the time to read and understand how this works.
Download the android SDK and install it. Once that's done, open the android SDK manager and download platform-tools.
Navigate to C:\Program Files (x86)\Android\android-sdk\platform-tools to make sure adb.exe and fastboot.exe are there.
Download the files in the OP and then copy oneXchopper, ownage, and busybox to the platform-tools folder.
Once the files are moved over, you need to open a command prompt window. In windows explorer open to that folder (platform-tools), hold down the shift button and right click anywhere in the folder (not on a file). Then click Open command prompt window here. You should then see a command prompt window open to the platform tools window.
Plug in your phone and make sure USB debugging is enabled (Settings, developer options - enable this if it asks you, make sure USB debugging is checked). Now back in the command prompt, type "adb devices". It should show you HTCxxxxxxxxxx. That confirms that your phone and adb can see each other. If not, make sure you have the correct drivers installed. You can google around for help with this if you have trouble.
With that, we're ready to start typing in commands!
Type the following commands in one line at a time, minus the stuff in parenthesis. When you get to the first adb shell line, hit enter, then type the following line by line:
chmod 755 /data/local/tmp/xpwn /data/local/tmp/busybox
ln -s /data/local/tmp/busybox /data/local/tmp/sed line
/data/local/tmp/xpwn
You'll see a bunch of lines of code (see below)
Once this is all done, type in "exit", then "adb reboot bootloader" (at the bottom of the code quote)
You should now be in the bootloader. type in "fastboot getvar cid" and it should show you that your CID is "11111111". If so, it worked! From here, you can follow the instructions here to unlock your bootloader (go to htcdev.com and follow instructions for unlocking a device. in the dropdown device list, select the bottom "other" option).
From there you have to flash TWRP (download link: http://techerrata.com/browse/twrp2/evita - NOTE download 2.3.3.1 because some roms don't flash via TWRP 2.5.0.0). Instructions on how to flash are here (http://techerrata.com/browse/twrp2/evita). you should install via the "Download - Recovery Image Method" - run the fastboot command from the platform-tools folder command prompt above. Your phone should be in bootloader ("adb reboot bootloader" will get you there if you are in android). Copy the downloaded recovery image file to the platform-tools folder, then input the command at the website above (fastboot flash recovery...). Once it flashes successfully, use the up/down volume buttons to select bootloader (on the phone itself), then select recovery via pressing the power button to select. In recovery, make sure you have your rom loaded on your phone first. then go to wipe, and click factory data reset and wipe system. then hit the home button, hit install then install the rom you want. (this is assuming you want to install a rom, not just root.
After unlocking, it will wipe your SD card and you will lose all your sd card data and will have to load a rom to the SD card after unlocking it. it will boot up into the stock rom after you unlock so you can do that here after unlocking and/or flashing TWRP. Alternatively, you can flash SuperSU in recovery to obtain root in the stock rom, then obtain S-Off (see sticky in Developer sub-threads). If you want to use CM or any rom in the Original Android sub-thread, you will have to downgrade your touch-panel firmware. There are stickies in the Original Android Development sub-thread for this.
Good luck!
DISCLAIMER: Please read this post 4 times over before you attempt this procedure. It may render your phone unusable (read: a brick) if you don't follow it correctly. I and anyone else associated with this exploit is not responsible for any issues that may arise from this process, such as if you brick your phone. Proceed at your own risk, and with extreme caution. This procedure is not for those who don't want to take the time to read and understand how this works.
Download the android SDK and install it. Once that's done, open the android SDK manager and download platform-tools.
Navigate to C:\Program Files (x86)\Android\android-sdk\platform-tools to make sure adb.exe and fastboot.exe are there.
Download the files in the OP and then copy oneXchopper, ownage, and busybox to the platform-tools folder.
Once the files are moved over, you need to open a command prompt window. In windows explorer open to that folder (platform-tools), hold down the shift button and right click anywhere in the folder (not on a file). Then click Open command prompt window here. You should then see a command prompt window open to the platform tools window.
Plug in your phone and make sure USB debugging is enabled (Settings, developer options - enable this if it asks you, make sure USB debugging is checked). Now back in the command prompt, type "adb devices". It should show you HTCxxxxxxxxxx. That confirms that your phone and adb can see each other. If not, make sure you have the correct drivers installed. You can google around for help with this if you have trouble.
With that, we're ready to start typing in commands!
Type the following commands in one line at a time, minus the stuff in parenthesis. When you get to the first adb shell line, hit enter, then type the following line by line:
chmod 755 /data/local/tmp/xpwn /data/local/tmp/busybox
ln -s /data/local/tmp/busybox /data/local/tmp/sed line
/data/local/tmp/xpwn
You'll see a bunch of lines of code (see below)
Once this is all done, type in "exit", then "adb reboot bootloader" (at the bottom of the code quote)
Code:
adb push oneXchopper /data/local/tmp/xpwn
adb push busybox /data/local/tmp/busybox
adb push ownage /data/local/tmp/phase1.sh
adb shell
(within ADB shell)
chmod 755 /data/local/tmp/xpwn /data/local/tmp/busybox
ln -s /data/local/tmp/busybox /data/local/tmp/sed
/data/local/tmp/xpwn
You will see this:
[+] This may take a few minutes.
[+] Success!
2+0 records in
2+0 records out
1024 bytes transferred in 0.001 secs (1024000 bytes/sec)
2+0 records in
2+0 records out
1024 bytes transferred in 0.001 secs (1024000 bytes/sec)
2+0 records in
2+0 records out
1024 bytes transferred in 0.008 secs (128000 bytes/sec)
exit (will exit from shell)
adb reboot bootloader
You should now be in the bootloader. type in "fastboot getvar cid" and it should show you that your CID is "11111111". If so, it worked! From here, you can follow the instructions here to unlock your bootloader (go to htcdev.com and follow instructions for unlocking a device. in the dropdown device list, select the bottom "other" option).
From there you have to flash TWRP (download link: http://techerrata.com/browse/twrp2/evita - NOTE download 2.3.3.1 because some roms don't flash via TWRP 2.5.0.0). Instructions on how to flash are here (http://techerrata.com/browse/twrp2/evita). you should install via the "Download - Recovery Image Method" - run the fastboot command from the platform-tools folder command prompt above. Your phone should be in bootloader ("adb reboot bootloader" will get you there if you are in android). Copy the downloaded recovery image file to the platform-tools folder, then input the command at the website above (fastboot flash recovery...). Once it flashes successfully, use the up/down volume buttons to select bootloader (on the phone itself), then select recovery via pressing the power button to select. In recovery, make sure you have your rom loaded on your phone first. then go to wipe, and click factory data reset and wipe system. then hit the home button, hit install then install the rom you want. (this is assuming you want to install a rom, not just root.
After unlocking, it will wipe your SD card and you will lose all your sd card data and will have to load a rom to the SD card after unlocking it. it will boot up into the stock rom after you unlock so you can do that here after unlocking and/or flashing TWRP. Alternatively, you can flash SuperSU in recovery to obtain root in the stock rom, then obtain S-Off (see sticky in Developer sub-threads). If you want to use CM or any rom in the Original Android sub-thread, you will have to downgrade your touch-panel firmware. There are stickies in the Original Android Development sub-thread for this.
Good luck!