1. Computer hardware causes.
The motherboard BIOS is not very well supported ACPI, it is recommended to upgrade the BIOS of the motherboard, generally can be resolved.
The power of the computer is not good enough to cause the shutdown to be normal. It is recommended to change a good quality power supply.
2. Computer software is responsible for the cause.
Check the Bootlog.txt file. The records listed below may result in computer shutdown failure, can be based on their own computer in the boot-packing directory in the Bootlog.txt shown in the situation, find out why:
There is a problem with the Terminate=query Drivers driver
Terminate=unload Network cannot load network driver conflicts
There is a problem with the Terminate=reset display video card setup or the display card driver
Terminate=rit a sound card or some old mouse driver and timer issues
Terminate=win32 Some 32-bit applications lock system threads
3. Check Advanced Power Management (APM): open Start | settings | Control Panel | system, and then click Device Manager. Expand System Devices | Advanced Power Management, click the Settings option, and remove the check mark before the "Force APM mode" is used. If you can shut down properly after restarting your computer, the problem may be due to APM, which should turn off advanced power management features.
4. Disable Fast shutdown: point "Start" | "Run" menu, enter "msconfig" in the Command box and click "OK", this time the System Configuration Utility window appears. Click on the "General" page, and then click on the "Advanced" option, which appears in the Advanced Troubleshooting Settings window, to select the "Disable Fast shutdown" selection box. If the computer shuts down correctly, there is a problem with the fast shutdown.
5. Check that the application has been shut down when the shutdown is turned off. If it is not turned off, you can close all applications. Because some applications may not shut down properly, the system does not end the application properly, causing a failure.
6. When you use IE 5 or later to access the Internet, you should be aware that they still occupy a large amount of system resources after exiting, usually make the system less than 80% of the available resources, after which running other software is prone to error, it is likely to cause the system will not be soft shutdown.
7. At the end of some software, the system may not shut down properly because some of the actions do have an effect on the system data or files. This situation differs from the poor design of software, which may be detrimental to the system itself and sometimes to multitasking. Although Windows XP has multitasking features, some large software can easily cause failures when multitasking, such as illegal operation, blue screen failure, and panic. The problem with this inability to shut down is usually not available the next time the computer is powered on.
8. Bugs in some programs or some 16-bit software can also disrupt system data or files in memory. Memory-resident software can also cause conflicts, causing system shutdown exceptions. It's not easy to find software that has such a problem, select "Start" * "program" * "Attachment" * "System Tools" * "System Information" to open the Microsoft System Information dialog box and select Tools * System Configuration Utility to set up allow or disable "start" Multiple programs that reside in Windows XP. Other problematic applications can only find their drawbacks during long periods of use in order to avoid errors in time.