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From past few days my computer automatically turn off. This happens after 2-3 days. I am thinking of three reasons

  1. I think i have very cheap grade power supply and may be that is not able to supply power and if power requirement increases computer turns off

  2. My hardisk is Faulty because this happens with me twice that when i restart my computer then it says disk not found. Then i turn off my computer computer. I started after 5 minutes and it went ok.

  3. May be my CPU is overheated and it cut off harddisk

I don't knkw what is the problem. is there any way to find out. Few things

  1. My computer always stay on and i use it for downloading things using IDM

  2. When computer turn off then i can still hear the CPU fan running. Harddisk gets turned OFF and My Mouse light also gets turned off

  3. There is one other thing that after this happens and if i restart computer then pop up comes from IDM software and if i click install IDM installs some files in windows directory in 2-3 seconds and then IDM icon appears. This usuaaly dont happen in normal restart. May Be IDM consumes too much power and it cause the system to restart. I am not sure

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What kind of computer is this? What CPU? – David Schwartz Jan 17 at 9:58
Desktop Computer P4 2Gb RAM , Only DVD RW and HD Attached – user1146320 Jan 17 at 9:59
If your computer is turned off, its not possible for the cpu fan to still be running, "turning" off disrupts the power to the motherboard. – Ramhound Jan 17 at 12:14
I think only harddisk gets turned off and everything else which is connected to USB. Even cd drive also works fine at that time – user1146320 Jan 17 at 14:03
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I would recommened a tool called Speccy from Piriform. http://www.piriform.com/speccy

It's a system information tool for Windows and will give you all sorts of data including CPU temperature.

If your CPU is overheating then there's a couple of things you can check. First, ensure you have proper air flow inside the case. Give it a good clean and tie up any cables that are hanging loose. Secondly, clean the CPU. Get some CPU cleaner, remove the old thermal paste and re-apply some fresh thermal paste and reseat the CPU.

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Is there any way that if computer got turned off then i can see what was the temmpertaure when computer turned off – user1146320 Jan 17 at 10:08
I'm not sure there is anything that will report back and specifically say "Computer turned off at xx:xx due to CPU overheating" but you could check the Event Viewer and look for 'Kernel-Processor-Power' events in the Source column under the System log. That will give you some indication as to when it powered off. There might be a detailed message there though, take a look and paste it back here. – Moif Murphy Jan 17 at 10:15
i get this error 41 The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. – user1146320 Jan 17 at 10:36
So there you go. You have a date and a time and some kind of reason but I'd give things a clean and monitor it for a while. – Moif Murphy Jan 17 at 10:43
It happened again just now. Hardisk was off. I presses DVD drive and it came out. It means motherboard is ON. does it mean that hard disk can be faulty – user1146320 Jan 17 at 13:39
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