So I just recently migrated from my Rev A MacBook Air to the Rev C MacBook Air. Everything goes through perfectly except whenever I open System Preferences, within a few seconds it completely locks up. It makes changing settings virtually impossible and I don't know why. I repaired permissions and cleaned the system out but it still locks up. This doesn't happen on the Rev. A but its happening on the Rev C. Anyone know if theres any preference files for System Preferences that I can try and delete to fix this?