This is very disturbing but I found out whenever I leave my COMPUTER on for maybe 2-3 hours it automatically shuts down instantly! No Blue screen or warning or even a noise it just behaves as if it was overheating before shutting down. And I know its not overheating since the internal temp display reads 83-85 degrees F. And I tried an experiment where I left the computer on for 2-3 hours and did NOT run anything. It was just sitting there going into a screen DARK mode with nothing but the Windows desktop on it and it still shuts down at 85 degrees F! Is my computer dying? Its a new model too only a few years old.

Any theories as to the cause? Why is this happening?

PS. This is a recent problem. Not too long ago my computer could be left on overnight in logout mode and still be on in the morning so I don't know why it has a sudden issue with this now.What's the history and make/model of the power supply? How about listing the components? What happened prior to this starting?I'm not too sure on the details I lost my manual a while ago. I have Windows XP. I left the computer on for a long time before because its a shared one so its never really been TURNED off I only logoff and turn off the monitor but the computer stays on all the time. I don't know where I can find the component details you want sorry.Everest Home is free and will tell you everything except the maker and wattage of the PSU. No manual needed.

http://www.majorgeeks.com/download4181.html
Say can someone tell me what temperature is a computer considered to be overheating at?? Whats the max recommended temp a CPU can be at before autoshutdown takes place? I managed to fix the other problem but the temperature is making me nervous.Depends on the processor and if the settings have been tweaked (overclocked) but 70C WOULD make me nervous. What is yours? And what about all the other details that were asked?Ah thanks. My cpu is now 112 F. The other info is not necessary sine my problem is fixed now. Thanks anywayHow about posting the solution for other interested parties?