Alright, so once again, my imac froze up again and when i restarted with the button on the side, i was welcomed with an everlasting boot screen. full of rage, i decided to once again, reformat and install os x, as this generally fixes the problem. so i went through the install process, and when it restarted after the first part of the installation, it just showed the grey apple logo with no spinning doo-hickey under it. AGHH!! Specs are in sig.