It shut down out of the blue again for the first time in a month i wasn't using the limited account. I clicked on the log and the help link said. What is SCM? How do i check if my systems are in a healthy state? I don't know if i mentioned it before but i AM running a lot of programs when these things happen i had 3 browsers open with at least 10 tabs open in each one and itunes open. I have added memory to my computer and have it maxed, also i keep it defragged and clean of junk files all the time. When ever i defrag it usually says i have 75% or more of free space.