[HD2 General] dirtybich:
I suggest to flash it back to Windows 6.5 and after that to start all over.

Here's a walkthrough :D

NEEDED TOOLS:

- HSPL4 by cotulla and bepe from: xdaforums.com/attachment.php?attachmentid=522724&d=1298224028 ..

- Radio 2.15.50.14 from: http://www.hotfile.com/dl/136377459/0998e73/Radio-Leo-2.15.50.14.rar.html?lang=tr

- Advanced ROM Update Utility by Barin from: xdaforums.com/attachment.php?attachmentid=492295&d=1295291861

- aMagldr 1.13 by Cotulla from http://xdaforums.com/showthread.php?t=893618

- aMagldr 1.13.06 by Cotulla but modified by symbuzzer from: http://androidforum.tytung.com/new-2-08-hspl-with-gez-exploit-t127.html

- Black LK by Kokotas from: http://www.mediafire.com/?tzg7whl9wwaih

- DFT DAF (DFT Android Flasher) by bepe and cotulla from: xdaforums.com/attachment.php?attachmentid=552314&d=1301130234

- Extented TWRP Recovery by Kokotas (recommended) from: http://xdaforums.com/showthread.php?t=2120297

- 4EXT Recovery (SD Version) by Xylograph from: https://goo.im/devs/Xylograph/Various/Recoveries/SD/recovery_4EXT2.2.7_leo_sd.zip/

- Custom Image Update Utility for cLK by Kokotas from: http://xdaforums.com/showpost.php?p=21679773&postcount=866

- Fastboot Drivers by shimp208 from: http://xdaforums.com/showpost.php?p=21679773&postcount=866

- sboot & tboot flashers by bojanbl from: http://xdaforums.com/showpost.php?p=31256707&postcount=967

1. HSPL INSTALLATION:

a) Download WinCE drivers from Needed Tools section and install it to PC.

b) Download HSPL4 from Needed Tools section and extract it on PC's desktop.

c) Power off HD2 and press Volume Down + Power buttons until see this screen: http://cotulla.pp.ru/imgtmp/hspl208.PNG

d) Connect HD2 to PC via USB cable and Run HSPL.exe

e) Select 2.08.HSPL for aMagldr bootloader, 3.03.HSPL for Black LK bootloader

2. RADIO INSTALLATION:

a) Download Radio 2.15.50.14 from Needed Tools section and extract nbh formatted file on PC's desktop.

b) Download Advanced Rom Update Utility from Needed Tools and extract it on PC's desktop.

c) Power off HD2 and press Volume Down + Power buttons until see this screen: http://cotulla.pp.ru/imgtmp/hspl208.PNG

d) Run LeoAdvancedRUU.exe and select CustomRUU (Task32) and Radio 2.15.50.14.nbh from Select NBH File option. Press Next and contiunue installation.

or

a) Download Radio 2.15.50.14 from Needed Tools section and extract nbh formatted file on PC's desktop.

b) Rename Radio 2.15.50.14.nbh to leoimg.nbh

c) Copy leoimg.nbh to SD card's root directory via a card reader from PC.

d) Power off HD2 and press Volume Down + Power buttons until see this screen: http://cotulla.pp.ru/imgtmp/hspl208.PNG

e) Press Power button for installing.

3. BOOTLOADER INSTALLATION:

a) You need to select a bootloader in this step. There are two alternatives; aMagldr and Black LK. For differences between them, please read this: http://xdaforums.com/showpos ... ostcount=1 There is a third alternative too. It is HaRET. For detailed info about it, please look 5th post.

b) Download aMagldr 1.13 or Black LK 1.5.x from Needed Tools section and extract *.nbh formatted file on PC's desktop. Use TWRP attached and lastest version of Black LK.

c) Power off HD2 and press Volume Down + Power buttons until see this screen: http://cotulla.pp.ru/imgtmp/hspl208.PNG

d) Run LeoAdvancedRUU.exe and select RegularRUU (Task28) and *.nbh from Select NBH File option. Press Next and contiunue installation.

or

a) Download aMagldr 1.13 or Black LK 1.5.x from Needed Tools section and extract nbh formatted file on PC's desktop. Note: Use TWRP attached and lastest version of Black LK.

b) Rename *.nbh to leoimg.nbh

c) Copy leoimg.nbh to SD card's root directory via a card reader from PC.

d) Power off HD2 and press Volume Down + Power buttons until see this screen: http://cotulla.pp.ru/imgtmp/hspl208.PNG

e) Press Power button for installing.

4. AMAGLDR NAND PARTITIONING AND RECOVERY INSTALLATION:

a) Download DFT DAF (DFT Android Flasher) from Needed Tools section and extract Recovery_250 folder on your desktop.

b) In Recovery_250 folder; open flash.cfg file via a text editor, for example Notepad.

c) You must to change system ya 250M value with needed system value by target rom. For example Tytung's NexusHD2 ICS 4.0.4 CM9 3.0b rom needs 170M system partition. I recommend to change this value like "system size + 10M, so for Tytung's ICS rom use "180M" If you want to use NativeSD or DataOnExt methods, you need a ext4 partition. For detailed information about partitioning sd car, please look 5th post.

d) Edit cache ya 10M to cache ya 2M and recovery rrecov|ro|nospr 5M cwm_recovery_leo.img to recovery rrecov|ro|nospr filesize cwm_recovery_leo.img and save flash.cfg file.

e) Download Extented TWRP Recovery and extract *.img file in Desktop\Recovery_250\ folder. You can use another recoveries too.

f) Delete recovery-raw.img file from Recovery_250 folder and rename extracted *.img file to cwm_recovery_leo.img

g) Power on HD2. In aMagldr menu, select USB Flasher option with volume up, volume down and green (answer) keys.

h) Connect HD2 to PC and run DAF.exe from Recovery_250 folder and continue installation.

5. ANDROID ROM INSTALLATION:

a) Download rom's flashable zip file from our site or XDA.

b) Copy zip file to SD card via a sd adaptor or USB MassStg option in aMagldr or Mount USB option in Extented TWRP.

c) !!! Don't forget to edit system size !!! & !!! Don't forget to create ext4 partition for dataonext and nativesd methods!!!

d) Reboot HD2 in Recovery Mode:

* For aMagldr users, hold Power button when HD2 is starting. And select AD Recovery option.

* For Black LK users, hold Home button when HD2 is starting.

e) In Recovery, select Install option and select roms flashable zip.

f) If your rom supports aroma installer, you should see some options like installation methods (Nand, DataOnExt and NativeSD) and connection method (rmnet, ppp)

6. CREATING EXT4 PARTITION FOR NATIVESD & DATAONEXT METHODS:

Note: You can do that on your device via ExTWRP and 4ext recoveries. There are several PC tools too.

Note 2: This operation will format your SD card. Please back up firstly.

-For ExTWRP:

1) Reboot into recovery and go Advanced>Partition SD Card menu.

2) Select EXT4 and set its size. (I recommend minimal 1024MB)

3) And swipe Swipe to Partition.

-For 4ext Recovery:

1) Reboot into recovery and go advanced>Partition SD Card menu.

2) Select Remove all partitİons ... from options.

3) For 1st sd-ext part; select size. (I recommend minimal 1024MB)

4) For 2sd sd-ext part; select skip.

5) For swap partition; select skip.

6) You can convert its type to ext3<=>ext4 from EXT3 - 4EXT - EXT4 menu.