Dear all, I am having problems with a fresh re-install. I re-installed and downloaded all the updates. It asked me to restart, so I did. Upon restart, the grey screen with the apple logo appeared as usual. However it does not boot into the OS. The 'circle' icon seems to be on an infinite loop. Does anyone have any ideas? Technical support doesn't know. They told me to go to an authorized support center! Does any one have any suggestions or experienced this problem?