Over the last, who knows how long, I found when I'd upgrade a hard drive and transfer xbox to xbox, loading UIX would basically frag the xbox. I never figured it out untill like 3 or 4 days ago. Yes, Im lazy thats why Im finally posting it!
Anyway I never copy my Tdata or Udata to the new hdd, and my UIX ini was set to have the background music kick on as soon as the dash did. Well, it turns out if there's no soundtracks to play this causes a problem. The dash loads up only for a split second and reboots to the bios.