My Macbook Pro (specs in sig) is constantly failing to start properly. When i turn it on, 8 times out of 10 the apple spinner will spin for about 30 seconds and then stop spinning, and stay there until I shut the computer down. Strange thing about it is that the computer starts in the background, (i can hear my email program loading up and if i hit the power button then enter it will shut down normally) but the screen is frozen on the stuck spinner. I've tried resetting the smc, the pram, I've erased and reinstalled the OS twice, and the issue always seems to come back. I loaded the computer in Verbose mode and it seemed to get stuck on "local host mDNS responder 161.1." So I went into the system library and moved the "mdns responder.bundle" to the desktop. It worked for a day, but now its back to failing on start ups. I'm about to throw my computer out the window, please help!