Yesterday, I upgraded to iWork09 and today I cannot get my MacBookPro to turn on. I have tried all the recommended reboot methods but nothing seems to work. I suspect the new software is the culprit because at the end of the load, there was a message to say the disc could not complete because of 'damage'. The software worked fine but I noticed the notebook was running significantly slower and now, I cannot even turn on. Can anyone help?