Hey Guys I am pretty new to this USB Loader issue. I followed the guide and the instructions etc. Did a search as well but cant find anything regarding this error. My Wii is - Softmoded 4.0U - Plays burned discs fine. IOS249 - cIOS38_rev13b - USB Loader GX - NeoGamma R4 R5 and R6 All work. My Preloader menus is v0.29 IOS v60 and Systemmenu v417 So what happend was I had the USB loader working fine. My Maxtor 1touch 3 300GB (replaced with a 120GB Seagate drive checked for errors with Seagate tool) is detected has the USB Launcher partition and I copied 1 game (Grand Slam Tennis to the HD). I did the update in the Gui Menu to Rev640. Now I am not sure if it does anything to the Wii itself of the files on my SD card which is being access on the HBC. I chose to update all ( Update DOL was the other choice) Well when I go to play a game (Grand Slam Tennis) I get this error. I hope I have given enough info. Thanks in advance. Ps. Yes I did unlock the GX Loader with the password and set the password to "blank"