My pc is shutting down what should i do to prevent it?

I found this for you, it's got pictures...

How to Prevent and Remove Access to the Shut Down Command

In Windows XP, Open Control Panel, Power Options, set to High Performance, set Sleep and Hibernate to no/never, set what to do when lid is closed. Use this procedure: http://windows.microsoft.com/en-us/windows-xp/help/setup/configure-power-management It's a good idea to Shut down at Start Menu and unplug when not in use to prevent damage due to power surges, and IF the battery malfunctions, prevent a fire hazzard.

Windows needs to be shut down properly to keep it stable, if hibernate mode is being used it eventually corrupt windows causing all kinds of symptoms, I recommend you make a backup recovery disc, and disable the hibernate feature to prevent complete window failure.

hi sir,

Does it just shuts down or it reboots?
If it shuts down this type of problems can be resolved by scanning the computer for a virus or
using the Windows Repair Disks. During boot if you can hit F8 and use safemode with command and prompt.

1 Type CHKDSK/F then hit enter
2 Press Y then hit Enter then reboot to see if this works.

If it reboots while booting up then.

Other things that might be preventing the computer to boot up most likely is the memory.
Take out the memory put it on a different slot or try a new memory.
Also make sure that the power supply fans are not dirty this prevents the computer to bootup.

If the temperature is hot in your place then the PC Laptop may shut down due to overheated system.The machine automatically shuts down to prevent any internal damage. However in some cases you can prevent the shut down if you can control the speed of the CPU fan which can be done by the following software called "Speed Fan 4.42".
Download it from here.
http://www.almico.com/sfdownload.php

If the weather is not hot around you and the system still shuts down then at least cleaning service is required from a good repair shop or a tech. There must be a lot of dust and the ventilation system might be choking with dust and unwanted atmospheric objects so proper air flow can be maintained in the machine.

Good Luck!

We need the name of the preventing software

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.

It could be "bad" RAM (Windows crashes, and shuts itself down, to prevent corrupting the files on the disk-drive).

It could be "overheating" (hardware shuts down to prevent combustion).

Hello.The laptop doesn`t get hot? This is usually the problem that causes the system to crash and shut down to prevent hardware damages.

Try tapping the F5 or F8 key (could be either one) right after you power up. This should take you to a short text message with a couple of choices to continue; you'll find the Safe Mode option there.