So I don't know if these are all related or are separate problems, but I discovered them all together so I'll post them together. First I was trying to install Halo, and when it got to the part where it tries to do "installation clean-up" (Halo is the only game or application I know that does this, by the way), it had an error. I'm fairly sure it was because of this, but even when I tried deleting and installing multiple times, the game wouldn't start. That was the first error. To see if it was something in my computer I tried repairing the permissions, but whenever I try this, it gets about 1/4 of the way through and says "you must quit Disk Utility because it has lost connection with disk management Utility", and makes me quit. I tried restarting my computer twice, but this still happens. shortly after this I tried opening Limewire, and it just bounces a few times in the dock before disappearing again. I haven't come upon another application that does this though, so I think this part is unrelated. The most worrying part of all of this is the fact that I can't repair permissions, so if anyone has suggestions on that, I'd love them. Advice for the other things would be great too of course, but the permissions part is most important.