Why does my computer suddenly shut down during use?

What brand of pc is this? Download a diagnostic program to test internal functions. Sounds like maybe a motherboard or power supply issue.

Did it do the shutdown process or just all of sudden go black? I would try another power adapter/charger sometimes they just go bad. If you know the adapter is working and you get no lights @ all its probably something internal like the power jack or motherboard.

Check CMOS and Memory Modules:::If the error message is "UNEXPECTED_KERNEL_MODE_TRAP," then it indicates you have problem with the memory of your computer. You need to check whether the SIMMs (Single Inline Memory Modules) are compatible and have the same speed. Secondly, also check whether you have set the CMOS (Complementary Metal Oxide Semiconductor) to the right amount of RAM. If these solutions do not work, you might have to replace memory in your computer....try to use system utility tool like Reginout.. Hope the problem is resolved.

This is a possible malware or virus attack. Your system is encountering data or system corruption preventing it to execute the command during shut down. Best fix is to reinstall Windows 7 in your computer to erradicate all errors and make sure to install an updated security software (antivirus) afterwards.

Opitions:
1.) Your system may have an over heating problem
Make sure all your fans are running and not making excessive noise.

2.)You may be a victim of spyware/maleware infections. You will need to have your system cleaned. This should help resolve your issue.

I would recommend trying CCleaner first to see if this helps you. Please keep in mind this will not rid your system of everything just keep you a float and offer you a fighting chance.

Please keep me posted and updated on your issue. I am here for you and will see your issues out till resolved.

Have a great and wonderful day :)

Thank You
Please do not hesitate to contact support :)
Frank
Live-Tech
1-888-361-8511
http://www.mylive-tech.com
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During when does your computer shutdown? Please check the diagnostic lights at the back as well which ones have light on it during the time it would shutdown.

Since you said that the light is blinking yellow it just says that your power supply is running outside its normal operating range. So most likely you would need a change of power supply. Maybe a higher wattage would be better.

You might want to try what I did when I had a completely discharged battery for my Dell Laptop. I attached the battery to the computer, make sure the computer is off and plug in the charger for a full twenty four hours (undisturbed). And this really worked. I had no problems with the battery. Good luck.

3 most common solutions to your problem are:

1. Bad power supply; once it heats up will quit without warning
2. Bad heatsink/fan; processor heats up and will lock up your Pc
3. Bad motherboard

Try opening the machine and give the inside a thorough cleaning, paying special attention to the heatsink and fan. Once clean and you've ensured the fan is operating, put it back together and see if your problem is fixed. If not, a new power supply will likely fix your problem. Best of luck.
Greg

Hi. the mother board seems to be having some initialization issues during boot up. this is common when the mother board is failing. i would check to make sure the battery on this board is working. if it is, the board my be ruined.
power board seems to be fine.
please rate and god bless.

Try this, just to see if the shutdown actually works.

Open a command prompt and enter the following:

shutdown -s -t 05

-s is to shutdown, -t 05 is a 5 second countdown.  Let me know if it actually shuts down.