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Computer shuts down

My sons computer shuts down in the middle of doing homework on a word document for no apparent reason. When we restart the computer all of the folders and shortcuts are gone from the desktop. He is disabled and uses an onscreen keyboard. We thought that might be the problem so we tried another onscreen keyboard. Same thing happens. The school has sent home 3 different computers. Problem happens on all of them. Sometime right away sometimes after several hours. What could be causing this? The school thinks he is doing this on purpose. He definitely isn't. Problem is...it only happens at home.
Please help us.
Joyce my computer shuts down in the middle of reading my email,

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  • Dick
    Dick May 11, 2010

    Are you using a surge protector with a battery back-up, so if the power flickers for a moment the computer stays on? What make and model of computer and keyboards are you using?

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  • 26 Answers

Most pcs will shut down to protect themselves in some way. need a bit more info, age, make etc

Posted on Jan 11, 2009

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1 Answer

My computer keeps shuting off.


the shutting down problem can be caused by:
  1. dirty processor radiator
  2. power supply problem
clean your radiator and restart your pc, if the problem was not solved check the power supply.

Jan 02, 2011 | Antec Neo HE 550-Watt ATX CPU Power Supply

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I was running the program "windon Defender" on it and walked away. When I returned the computer was off and wasn't turn back on.


The Windows Defender Application is the Antivirus Software which will be pre-installed with the Windows Operating System(Windows Vista, Windows 7).
The Computer will always Shut down after any Windows Updates or any Operating System Updates are downloaded and installed.
If you are connected to the Internet and running Windows Defender, the Computer will automatically download the Updates for the Windows Defender Application.
Once the Updates are downloaded and installed, the Computer will prompt for a shut down.
The count down will be for 10 seconds.
After 10 seconds, the Computer will install the downloaded Updates and shut down.
This might be the reason for the Computer to shut down while using the Windows Defender.

If the Computer still shuts down randomly, the issue might be due to overheating.
All the Processors in Notebooks are designed to shut down automatically, if there is any overheating issues.
The overheating issue mainly occurs due to the malfunction of the Cooling fan.
If the Computer shuts down frequently, the issue might be due to the above factors.
It would be better to get the Unit examined at the Service Center.

Jun 22, 2010 | Acer (56.04145.901) (5604145901) Power...

2 Answers

In my desktop every 20 min my desktop shutdown but why. can u give me the solution


Might be problem with Processor cooling fan and heat sink.. check this section properly..

May 31, 2010 | Packard Bell (190169) Power Supply

1 Answer

I jus left my computer optiplex gx260 on and when


Your automatic update from microsoft probably updated your machine and shut it off, by default it is set to update if their is one, every tuesday at 2:00 or 3:00 am and will either restart or shut down your machine.

if thats not it then your computer may have gone into hibernation or standby.

May 25, 2010 | Dell POWER SUPPLY Power Supply

1 Answer

Machine shuts down on it's own


It does sound like an overheating computer they are designed nowadays to shut themselves down if there is a problem

What you should do is check the fan assembly and if it is loose at all that would give good reason to do what I am going to advise.

Disconnect the fan from the board.

Check your manual for the exact instructions but you should remove the cooler completely

DO NOT REMOVE THE CPU

Now with nothing more than isopropynol and cotton bud sticks or another alcohol based cleaner remove the old thermal grease / sticker from the top of the CPU (make sure it is clean)

At this point it is up to you but you could consider a newer better cooler
You could take your old cooler to a good computer shop show them it and just ask for a better one

If you are using your original cooler then here we go
Do the same with the underside of the cooler.
While the cooler is off it may be worth giving it a good 8low job
.
Now apply some new thermal grease (most computer shops have it)
Be careful about how much you put on

Here are some basic instructions

Once you have re-assembled your cooler and re-connected it check everything is OK and power up the computer.

If everything went to plan you should now be back in business.

Another consideration is that many cases have places in them for extra fans and usually extra connections on the motherboard too.

They are quick and easy to fit.

Quite often I will fit TWO in what is called a push/pull configuration. One pulls cool air in while the other pushes hot air out

Aug 30, 2009 | HP Power supply ( eMachine Compaq&HP )...

1 Answer

System is not workin properly


You might try this. Shut down the computer, disconnect power cords, disconnect everything at the back of the computer, mouse, key board, etc. Open the case, ground yourself by touching an unpainted area of the case and remove the power connectors to ALL optic drives and floppy drive if you have one. (Of course do not disconnect the hdd.)
Reconnect mouse, keyboard, etc., and power cords to wall outlet.
See if it will post now. If it does I say you have a faulty power supply.
I was given a computer which was doa. It would not post, after I tried the above routine it posted then booted to windows.
I replaced the psu and now the computer works fine.
Hope this helps!

Blunderbuster

Feb 02, 2009 | System Power Supplies

1 Answer

Gateway 160 W power supply


if you need a new power supply you would want to by a new one with 160w and up:)

Jan 04, 2009 | Gateway (6500683) 160-Watt Power Supply

1 Answer

I need to know how to reboot my packard bell pc


Under the start menu there should be an option to shut down; restart; sleep. Use the restart option & it will start rebooting. If this does not work then close all your programs and hit ctrl+alt+del twice. This should start a reboot. Hope this helps.

Dec 21, 2008 | Packard Bell (190169) Power Supply

1 Answer

Computer shuts down


Could be the power supply,Try changing the power supply

Jul 12, 2008 | System Power Supplies

2 Answers

Computer powered down while in use.


Your power supply may have failed. Such failure is common, especially with the low quality supplies used in some machines these days. Sometimes this is due to the failure of the fan inside the supply, which causes overheating, and eventual component failure (especially of the electrolytic capacitors). If you have a voltmeter available, you can check for the presence of voltages on the cabling which connects to the computer motherboard, drives etc.

Google for the proper pinout specifications- the cabling has colored wiring.

Have the computer plugged in- first check for the standby voltage- a +5 volt line which powers a small circuit on the motherboard. If this is missing, your machine will not power up at all. If present, then press the ON button, and check for voltages on the red and yellow wires. On the red +5 volts, yellow +12. These should be very close to those exact readings. If more than a few tenths of a volt off (esp. the +5), then the supply is bad also.

Jun 10, 2008 | XION PowerReal 600 (XON600F14T201)...

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