I haven't been able to update my wiiU lately and I am pretty confident that it is due to homebrew. So I googled around and everyone says to do a SysCheck and compare it to a correct one to find out whats messed up. So I ran a syscheck and it froze on IOS41 and it says in sysCheck that if it freezes on an OS that it is corrupt. I would really appreciate it if someone could take the time to upload a known clean one for me! Thanks!