So at first, I tried playing backups on my wii but it didn't work. A friend let me borrow his and it I still get the 4100 error on his too. So, thinking it was my burner, I went and bought another one at wal-mart (I actually needed it because all my isos are on a computer without a burner and I was transferring between comps a lot). Well, they won't work with this either. So I've come here asking for recommendations and what would be the problem out of the things I'm using. I'm using... A LITEON DH-20A4P Drive Maxell DVD-R disks IMGBurn (Can't change to DVD-ROM due to some medium error. I've heard I don't need to with dvd-r's but I'm not sure) Games Tried: Mario Galaxy (NTSC) 3 burns, 2x, 4x, and auto | Guilty Gear AC (PAL) 1 burn at 4x | Star Wars: The Force Unleashed (NTSC) 1 burn at 4x Any help or recommendations would be awesome. Even if you have yours working, I'd love to see what you're using so I can look into the same. Thanks in advance. EDIT: I've noticed something that might help with further investigation. When I have "The Force Unleashed" into my wii console and I go to the disk channel, the wii/gcn disks spin for a while and then it gives me this error: This only happens with The Force Unleashed. All other games work fine.