Why does my computer shut down on its own?

Answer

The shutdown can be due to software or hardware issues: the computer may be infected with a virus which corrupts the operating system, or there is a problem with the power supply unit especially the fan for a more complete detailed information log onto:- http://www.theeldergeek.com/shutdown_issues_in_xp.htm
Q&A Related to "Why does my computer shut down on its own"
if your computer runs for a while then shuts down, this is often a lack of power to the system. Try removing anything you can live without (modem card if you use ethernet, soundcard
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1. Check for BIOS updates on the laptop manufacturer's website. 2. Check for operating-system updates. 3. Make sure that there aren't any obstructions to the air vents. These will
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The most common reason for a PC to shut down is because it is overheating. Check the inside of your PC for dust and used canned air to remove any that you find. Be sure that the room
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When your computer powers down without warning, this usually indicates a problem with a hardware device, such as your CPU, your power supply, or the CPU on your graphics card overheating
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