Red, I do not know much about your processor issues but I think the problem has got nothing to do with the 'System Idle Process'. Let me make myself clear. The 'System Idle Process' doesn't do anything, its just what the CPU does when its not doing anything. If the 'System Idle Process' is at 98% it doesn't mean your processor is 98% busy with the 'System Idle Process' hogging it, it's actually just 2% busy. So thats one thing ruled out. The hardware experts will be here soon and I am sure that they will help you resolve your problem. :)
By the way, you have posted the thread in the right forum. Also, a very warm welcome from me to you. :)
-- Goku