Hello, I have a problem with my uMBP 17''. I was really very pleased with my uMBP up until I switched to SL. After switching to SL, my uMBP got slower and started to freeze, with 10.6.2, my computer didn't even start. However, my MBA just got better with 10.6.2. I repaired disk and the permissions, formatted... several times but after a couple of days, my computer starts freezing... Everything was good along with freezing and applications shutting down... I just turned of my computer and travelled back to home and now, all i see the grey screen and the loading icon with apple logo. it's there for hours, even after repairing the disk and the permissions. I am not able to go for safe boot, i booted from the dvd and that's it. Shall I install it again? or Shall I wait until I get back to Miami an take it to the Apple store? Does anyone know why these things have happened? And how does this work, should I schedule an appointment with Apple Store or do i have the chance to show up and leave it there anytime? I bought my uMBP 17'' on March 2009 and I have an applecare.