Ok so I followed this guide [http://gbatemp.net/threads/guide-noob-guide-to-wii-u-hacking.451297/] Went with Haxchi, used Zelda: spirit Tracks purchased from store, all went well. Followed the guide as per instruction and chose the Mocha Cfw as it sounds like it suits what im wanting to do with my console. Managed to install several Wii U titles to external HDD using wup installer y-mod (I used several of the installers found on HBAS and then went onto installing some VC games, this is when I ran in problems - they would only part install then the program would either back out back to HBL or crash the WiiU. I noticed this with some Wii U games also - Donkey kong Trapical freeze was one, I couldnt get it to install to USB. I accidently chose to install to nand after several fails with DK and it installed after failing to install to USB. Then I started moving files from nand to USB and also (im not sure why) turned on the rednand setting in mocha, I soon turned it off as I realised I didnt have a clue what I was doing - I was just looking for a way to install the games that had been failing to install. when i next went back to system menu Haxchi was gone and Zelda: Spirit Tracks was in its place, I deleted zelda, removed SD and USB, reinstalled Zelda but it fails to install - have tried many times - gives me error code: 105-3687 - no now I have no HaxChi. I have full bckup of nand, if this helps. Is it possible to fix what ever has happened and get Haxchi back? When I installed all the first lot of games I was using only Haxchi, it wasnt until I booted form Mocha that I noticed some games that wouldnt install previously now were installing (depending which wup installer I used) and also visa versa - some games that I had installed before booting from Mocha and deleted now wouldnt install, got me scratching my head. I havent tried downloading a diffent Ds game from store and dont really want to, I would be a bit upset if it failed to install after paying for another DS title! I have deleted the DS game used for the Haxchi and the haxchi - well what I can see of it via system data management. Haxchi still appears in my start menu but will not work, which ever way I try. I dont know if this has anything to do with it but one of the games I downloaded from Wii U usb helper was Zelda: Spirit tracks - same game as the one I paid for to do the hack -I really wanted to play this game! Also I found that some of the games that wouldnt install would install using the Wii U usb helper tool and installing from SD not from computer via the app - I have just tried this now with SLENDER and got to half into installation then black screen message 'the there is a problem with the USB storage device' error code: 160-4714. Think that is everything. Im really looking forward to someones help, massive appreciation in advance.