Hello... Please help... I have an Imac 4,1 model, OSX 10.6, intel core duo I have about three weeks with situations on my imac, when I shut it down it does'n recognize the command and instead of shutting down it get restarted. I have verify and repair disk permission with no results and I have done clean installations and the problems continues. I dont have the Applications Install Disk 2 to make a hardware test, I have search it on the internet but I can't find one.