I accidently trashed my mach_kernel file from my hard drive and now my OSX finder doesn't work. I have reloaded OSX but the dock won't function and I can't access my hard drive. The screen is solid blue except for the time, battery, and internet connect icons and no white holding bar. I can launch internet connect and then the white bar appears and I can get to my apple icon and recent apps, etc. But when I quit out of apps after about 10 seconds the white bar at the top starts to flash on and off and then nothing works, not even the mouse; I have to restart. Help!