I'm an owner of a 24" 2.4ghz aluminum iMac which is a little over a months old. Lately I have been experiencing random freezing/lockup if I open an application or surfing the internet. Only way to fix the problem is I have to shutdown my mac and restart it. Now for the past week my iMac takes about average 17 mins to load to the desktop from either a cold boot or a restart. Anyone else has this problem or know how can I fix it?