i dont know if others had the same problems as me but i havent found anything on the internet about it and figured it out for myself.

when your first time transferring wii games to your usb drive ive found out about games like guitar hero 3-5-world tour, vanhalen, band hero etc, basically music type back up games, when you install them they 100% automatically, if you press A or B on the wii remote it then goes back to the list where all your games go and you'll have a game thats corrupted and stuck on your hard drive. it wont let you delete it, play it or access it to delete it, if you open it will completely freeze and will stay like that, you'll have to format your hard drive all over again.

for the newbies out there id recommend getting wbfs manager 3.0.1 to fix it, (at that time i didnt know about it). also when it 100% shut the wii off manually boot it back up open usb loader gx, if you try to install it again you'll repeat the process and will 100%.

to fix it pop in an official wii game like wii sports (cause its small and doesnt take long and it comes with the wii) install it and try installing guitar hero 3-5 etc. again, it should pretty much fix the bug. once you shut off the wii you'll have to install an official game again to install another one, so install your guitar hero games first after installing an official game and you should be good to go. its been tested on my wii and my friends cause his did the same thing.

hope that was useful!