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Windows Restarts or Shutdown without Warning

This Error could be caused by any of the following possibilities.
1. Software error
2. Hardware error
3. Heat Problem
4. Computer virus
5. Operating system Error

Software Error

Errors generated by software programs can cause a computer to reboot unexpectedly or without warning. If you are running Windows XP see the below section "For Windows XP users" before continuing.

If you are not running Windows XP or following the below steps still cause your computer to reboot without warning. Boot your computer into Safe Mode, and let the computer run in Safe Mode.

If the computer is still rebooting in Safe Mode the error is likely not software related but something else, skip to the next section. If the computer is not rebooting in Safe Mode it is likely you have software related error.

Note: Automatic Restart in Windows Xp, is a process to protect from hardware failure if it is caused by a Software/Driver Error.


For Windows XP users

Windows XP is designed to automatically reboot each time an error occurs such as a Blue Screen of Death or BSoD. Although this may be nice for errors that do not occur often, users who have a re-occurring error may wish to identify the error to troubleshoot it. Below are the steps on how this feature can be disabled and enabled in Windows XP.
From the desktop right-click on My Computer.
Click the Properties option.
In the System Properties window click the Advanced tab.
In Advanced click the Settings button under Startup and Recovery.
In the Startup and Recovery window uncheck the Automatically restart check box.
Click Ok.

Now if the computer generates and error it should not automatically restart and enable you to display any errors your computer may be experiencing.

Hardware Error

Any failing hardware component in your computer could cause your computer to unexpectedly generate an error and/or reboot without warning. If you have recently attempted to add a new hardware device, remove that device to make sure it is not causing your errors.Make sure you are not encountering any hardware conflicts by viewing Device Manager for errors.

New drivers can also cause this error, if you have recently performed any hardware driver updates you may wish to try an earlier version of the drivers.

If you have updated drivers and removed any hardware that could be causing this error and continue to experience random reboots, it's possible that the memory is bad in the computer.

Computer virus

Computer viruses such as the blaster virus are written to reboot your computer without warning. Usually these viruses will make the computer reboot ever 5, 10, 15 or 30 minutes after the computer has booted.

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.

Heat Problem

Many computer today are designed to turn off or automatically reboot if the computer, processor, or other device in your computer gets to 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 fan) and/or if your BIOS monitors the RPM of the fans enter BIOS and make sure the BIOS does not report any errors.

Users may also be able to determine how hot their computer is by onboard thermal sensors, if your computer comes equipped with these sensors make sure your CPU is not running to hot.

Problem 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 problem 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 reboot while letting the computer sit in CMOS it is likely that you are in fact experiencing an error with Microsoft Windows and it is recommend that if you have followed all of the above recommendations that you reinstall your version of Microsoft Windows.

Note: Operatng System is Mainly Damaged from Virus attacks and also from lack of Security, or if you are using an Microsoft Windows Make sure you have Windows Xp Service Pack 2.Service Packs can lightly rescue your system from light errors.

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