Ok so I've been searching around for a while now trying to find someone with this same issue and haven't had any luck. I softmodded my xbox by hotswapping and installing ndure. Everything worked great, I installed emulators and all that and I was happy. But then I wanted a bigger hard drive so I took an old 80gb I had lying around and used xboxhdm and a clean version of msdash, just made a stock hard drive then installed ndure then locked it. Everything went smoothly until I connected it to my xbox. I got an error 13. I was kinda pissed but I reset the xbox a couple of times and it booted straight to unleashx. Now it intermittently gives me error 13 when I try to start it up. Sometimes I have to start it up a few times for the error 13 to go away but it always does. I replaced the dash with xbmc and it works great as well. I can ftp, download updates, watch videos, etc. But the error 13 always comes back for some reason and I have to reset it a few times. Does anyone know what the problem might be? I read a brief comment from someone about it possibly being the DDO on the hard drive? Im not sure what that means. The hard drive is a Seagate barracuda ST380021A 80gb. Thanks in advance if you can help.