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Computer Keeps Shutting Down on its own - Computers & Internet

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This issue could be caused by any of the below possibilities.
Heat related issue.
Hardware issue or error.
Computer virus.
Issue with operating system.
Other failing hardware

Heat related issue
A computer that turns off without warning is often a heat related issue. Many computers today are designed to turn off or automatically reboot if the computer, processor, or other device in your computer gets too hot. If you have heard any abnormal noises coming from your computer recently such as a high squealing, this could indicate a fan may be failing in your computer.
You can first start by verifying the fan on the power supply is working by examining the back of the computer and seeing if the fan is moving and moving smoothly. For all other fans in the computer, you will need to either open the computer and make sure the fan are working (processor fan and case fans) and/or if your BIOS monitors the RPM of the fans, enter BIOS and make sure the BIOS does not report any errors.
While inside the computer it's also a good idea to verify the processor heatsink is properly connected by disconnecting and reconnecting the heatsink. If the processor heatsink is not properly it will not keep the processor cool causing the computer to overheat.
Hardware issue or error
Any failing hardware component in your computer could cause your computer to unexpectedly turn off without warning. If you have recently attempted to add a new hardware device, remove that device to make sure it is not causing your issues.
Before attempting to remove any hardware, make sure you are not encountering this issue because of hardware conflicts by viewing Device Manager for errors.
If you have not recently installed any new hardware into the computer, the next best solution to determining if this is a hardware issue would be remove any hardware on the computer that is not needed. For example, remove your modem, network card, sound card, and any other expansion cards that are not needed for the computer to operate. Run the computer without these cards to see if they are the cause of your issue.
Computer virus
It's possible for your computer to be infected with a virus that is designed to shut down your computer or turn it off. If your computer seems to be turning off when executing a certain program at specific times in the day, it could be infected.
If you believe your computer may be infected with a virus or are uncertain if your computer is infected with a virus, make sure your virus scanner definitions are up to date.
Issue with operating system
If after following each of the above recommendations your computer still continues to reboot, it is likely that you are experiencing a Microsoft Windows operating system related issue that cannot be explained. To help make sure this is the case, please try the below steps.
Reboot the computer and enter CMOS setup as the computer is booting.
After you have loaded the computer in CMOS setup, let the computer sit.
If the computer does not turn off while letting the computer sit in CMOS, it is likely that you are in fact experiencing an issue with Microsoft Windows or your operating system and it is recommend that if you have followed all of the above recommendations that you reinstall your version of Microsoft Windows.
Other failing hardware
If after reinstalling your operating system, or during the installation of your operating system, your computer turns off abnormally, it is very likely that other hardware is failing in the computer. Often this is RAM, CPU, Motherboard, and/or Power Supply (in that order).
If you have extra available parts or have a friend or co-worker with a similar configuration that is willing to allow you to test their hardware in your computer, try swapping these parts to determine if they are at fault. Otherwise, you will need to have the computer serviced.

********************************
Try to get into your computer after start and before windows load hitting the key F8 and selecting SAFE MODE and see what happen there. Check for virus and spyware.

********************************
This will fix your problem.
Don't forget to rate my help! :-)
Thank you for using FIXYA!
Pablo

Posted on Oct 14, 2008

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After making sure your computer is cleared of all the viruses then read the following.

I had a the same problem and i changed the ram,then i replaced the Processor and then i had to buy another mobo and all that did not solve.Than finally i went for the PSU a very cheap item of hardware.Eureka!!!!!!!!! It did the job.

good luck i hope it works for you.

taburi

Posted on Mar 15, 2009

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My acer 5750 i7 keeps shutting down


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Two important things that you should do to fix a laptop which keeps shutting down are:


1- Scanning computer to eliminate malwares, spywares and the viruses from your laptop.


2- Repairing and cleaning Windows registry.


The registry errors, however, are the internal errors and can become a cause of system crashes and freezes.
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Your computer is overheating, it is shutting itself down to prevent damage to the internal components.

Your computer should be serviced by a computer technician. He/she will clean the components and chassis of dust. This will increase airflow over the components, meaning your system will be stable and will not shut down unexpectedly.

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Computer may be shutting od due to following reasons:

Computer Virus
There are higher chances of a computer shutting down due to the interference of a computer virus. The virus gets into the computer and fiddles with crucial sections of the operating system, which may cause the system to shut down automatically. You need to install a good antivirus software and get the computer scanned thoroughly for any malware and viruses. Also see to it that the operating system and all hardware drivers are updated.

Power Supply
The computer power supply unit is an equipment that is installed in the cabinet to provide power to the system for operation. Your computer can shut down, if there is not enough power supplied to it for handling the programs running. If you are using the computer for running intensive software such as PC games, the system would require more power than what is actually available. Another reason can be overheating of the power supply. After the power supply is used for a substantial period of time, there is a possibility of dust getting collected inside it. And this may cause it to overheat, resulting in the shutdown of the desktop computer. If the power supply is at fault, you may need to get a new one installed.

Overheating of the Motherboard and the Processor
As with the case of dust getting collected in the power supply, the computer motherboard and the processor can also collect dust, which may be the reason for their overheating. This may also be one of the reasons why your computer keeps shutting down and restarting. You need to open the computer cabinet and clean the dust off the computer parts. The CPU board and the processor can also overheat because of many applications running. If this is the case, then it is suggested to keep the running of applications as less as possible or increase the size of Random Access Memory (RAM). Bad capacitors on the motherboard is also one of the reasons, why your computer keeps shutting down very often.

The 'Automatically Restart' Setting
If you are using Windows XP operating system, there is a setting that indicates the computer to reboot if it detects an error in the system's operation. In order to check if this is the problem, click on 'Start' and 'Control Panel', then select 'Performance and Maintenance'. Click on 'System', then the 'Advanced' option, and select 'Settings' from the 'Startup and Recovery' section. You will find an 'Automatically restart' option, which you need to uncheck for preventing the system from rebooting. Read more on computer keeps restarting on its own.

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