- Tip: This document is for computers that are restarting or rebooting by themselves and not computer's that turn off and remain off.
Software issue or error
With the introduction of Windows XP Microsoft designed Windows to automatically reboot each time an error occurs such as a BSoD.
Although this may be nice for errors that do not occur often, users who
have a re-occurring error may want to identify the error to
troubleshoot it. Below are the steps on how this feature can be disabled
and enabled in Windows XP, Vista, 7, and 8.
- From the Desktop right-click on My Computer.
- Click the Properties option.
- In the System Properties window click the Advanced tab or the Advanced system settings link.
- 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 an error it should not automatically restart
and should display an error message, most likely a BSoD.
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Hardware issue or error
Caution: Some of the steps below require you open your computer. While in the computer, be cautious of ESD.
Any
failing hardware component in your computer could cause your computer
to unexpectedly generate an error 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 issues.
Make sure you are not encountering any hardware conflicts by viewing Device Manager for errors.
New
drivers can also cause this issue, if you have recently performed any
hardware driver updates you may want to try an earlier version of the
drivers. Additional information and help with computer drivers can be
found on our drivers page.
If
you have updated drivers and removed any hardware that could be causing
this issue and continue to experience random reboots, it's possible
that the memory is bad in the computer.
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Finally,
hardware devices that are not installed properly in the computer can
also cause random reboots. Make sure all the cables and expansion cards
are connected properly to the computer. The best way to determine this
is to disconnect and reconnect all cables and expansion cards.
Computer virus
Computer viruses such as the blaster virus
are written to reboot your computer without warning. Usually these
viruses make the computer reboot every 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.
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Heat related issue
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.
First, verify 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 need to either open the computer and verify all fans are working, e.g. processor fan and case fan.
A temperature gun
like that shown in the picture can also be used to help gauge how hot
components or integrated circuits are running the computer.
Tip: If your BIOS monitors the RPM of the fans enter CMOS Setup and verify it does not report any errors.
Note: If this is a laptop computer,
there is still a fan located on one of the sides of the laptop that can
be checked. Make sure this fan is blowing or that you can feel hot air
coming from the laptop. You may also consider getting a cooler pad if you find your laptop is getting hot often.
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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 try the steps
below.
- 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 issue with Microsoft
Windows and it is recommend that if you have followed all of the above
recommendations that you reinstall Microsoft Windows.
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