Hi, all. I am a new mac user. I bought a macbook pro a couple months ago and it is giving me trouble. Sometime it just FREEZES and nothing respond. Just the mouse cursor but nothing else, not even the apple logo to shut the laptop down. That happens when i using very simple applications, like Firefox, Office 2008, etc. I have to use the power bottom to restart the laptop again. That worries me because it does not happen to my since old times when I had my first PC with Windows 98. It did not happen to me neither on XP nor Vista. Any suggestion will be great and helpful. Thank you!