the fan was looked at a few months ago when it started with the shutting down as i thought it was this but new fan installed and still shuts down confused lol
and due to it taking 45mins to a hr to let me get it to boot in sound like some hardware is failing inside on the forums for my starting up problem looks like it could be the Bord on its way out as i know its not the HDD as it had a new one of them as well not to long ago

lets face it it just doesn't like me painting day in day out 7 days a week its going on strike lol