What should I do if my computer cannot be turned on or off?

 

What should I do if I cannot start it?

1. Shutdown takes a long time or cannot be performed once
Too many background programs are running. Many programs are enabled before shutdown, and the memory cannot be completely released. You can clean up some programs and delete junk files residing in the system folder.
Check whether the startup item contains abnormal program files. If yes, remove them.
In addition, you can modify some key values in the registry, "HKEY_CURRENT_USERControl PanelDesktop", and set the key value of "AutoEndTasks" to 1.
Modify "HungAppTimeout" to "4000 (or smaller)" (default: 5000). The key value is also under "HKEY_CURRENT_USERControl PanelDesktop". In the last step, locate "HKEY_LOCAL_MACHINESystemCurrentControlSetControl ", similarly, set WaitToKillServiceTimeout to "4000". After this setting, the shutdown speed is significantly faster.
Registry entry method: start -- run: regedit. Back up the registry before modification. You can right-click an item and save it as a registry file before modifying it. If an error occurs, double-click it to restore it. It is best to use master optimization and other tools for modification.
2. Select shutdown but restart
This is generally due to an error in the power management program or in the default settings of Windows XP, the system will automatically restart when an error occurs. If this function is disabled, the automatic restart failure can be solved. The solution is as follows: Right-click my computer and select Properties. In the displayed system properties window, click the Advanced tab, click "settings" in the "start and fault recovery" column to bring up the "start and fault recovery" window, in the "system failure" column, remove the "auto restart" option (as shown in the figure ).

3. Blue screen appears during shutdown
Please refer to the above blue screen solution for processing

Faults during operation

When running a program, the system prompts that the error memory cannot be READ or WRITER (written)
A program error occurs. The memory cannot be READ. Occasionally, the program conflicts. It is similar to the occasional blue screen. It is often dangerous, and the consequences are very serious. It is often a waste of half a day, or a more thorough re-installation of the system!
Common causes and solutions for the memory failure to read written
1 Memory Stick is broken and replaced
2 dual-memory incompatible use the same brand of memory or only one memory
3. Memory quality problems
4. Heat dissipation problems strengthen the internal heat dissipation of the chassis
5. The memory and motherboard are not plugged in, or other hardware is not compatible with the memory plug-in or another slot.
6. Hard disk replacement due to hardware problems
7. Reinstall the driver for driver issues. If the driver is a new system, install the motherboard driver first.
8 Software damaged and reinstalled software
9 software BUG patching or updating to the latest version
10 software and system incompatibility patch the software or try the system compatibility mode
11 There is a conflict between software and software. If any new software has been installed recently, uninstall it and try again.
12 The software should use other related software to reinstall the software. For example, if an error occurs when playing a certain format file, the decoder of the file may be faulty.
13 virus-related antivirus
14 anti-virus software conflicts with the system or software. Because anti-virus software enters the underlying monitoring system, it may conflict with some software. Uninstall it and try again.
15 if the system itself has problems, sometimes the operating system itself also has bugs. Install the officially released update program, such as the SP patch. if not, reinstall the system or change the system of another version.
16. Check whether Microsoft net is installed in the add/delete programs on the control panel. framework. If it has been installed, you can consider uninstalling it. Of course, if you need NET. you can reinstall the Framework.
In addition, if you are using a ATI graphics card and you are using an SP2 patch (some ATI graphics card drivers need to be in a normal operating environment of the NET. Framework ). In this case, you can find a ati driver that does not require the support of NET. Framework.
If the above method does not completely solve the problem, try to use the "ie repair" software and check whether there is a virus or something like that.
17 register all dynamic link files again
Run cmd, press enter, and enter at the command prompt.
For % 1 in (% windir % system32 *. dll) do regsvr32.exe/s % 1
This command is slowly lost. If entered correctly, the screen will be quickly rolled. Otherwise, failure will not work. After you press enter, wait slowly (it may take 1-2 minutes) until you finish running the task.
If none of the above can be solved, only the system will be reinstalled ......
A program error occurs. The memory cannot be WRITER.

This kind of fault may be
1. Failed to check memory allocation by application
II. Data blocking caused by system installation exceptions detected in data protection of the XP system.
In the first case, check whether the memory or a program conflicts with anti-virus software. In the second case, you can disable the impractical data protection. The specific operation is as follows:
1. Modify system attributes (this method does not completely disable data protection)
Right-click my computer and choose Properties & rarr; advanced & rarr; (performance) Settings & rarr; data execution protection ", select "enable DEP for all programs and services except the following selected programs", click "add", locate the installation directory of an application, and find the executable file of the program, add it in. Generally, this program runs normally. After the computer is restarted, the settings take effect.
2. Directly modify the Boot. Ini file (this will completely disable data protection)
Find the Boot. Ini file in the root directory of the partition where the WinXP SP2 system is located. Note that it has an additional "NoExecute" parameter, and the previous modification to DEP in system properties will also be reflected in this parameter.
There are only two options in the "data execution protection" item, which are reflected in the Boot. Ini file as the "Optin" and "Opton" values of the "NoExecute" parameter. However, some applications or drivers are not compatible. Even if they are "allowed" in "data execution protection", they still cannot run normally, for example: 3721 of Internet assistants and ZoneAlarm Pro depend on the other two values of the "NoExecute" parameter.
NoExecute = AlwaysOff is equivalent to disabling the EVP and DEP functions. At this time, both functions will be lost. All compatibility issues caused by this feature are solved.

L The system runs slowly and the program stops responding/crashes
Solution: check whether an abnormal program occupies too many system resources in the Task Manager. Locate the program and end it, you should also find the startup item in [system configuration utility] and deselect it. Task Manager entry method: press Ctrl + Alt + Delete, or click [start]-[run] and enter taskmgr.exe "OK.
L user configuration file corruption caused by Ziguang pinyin, resulting in failure to run the program
Solution: In this case, you should log in to secure mode or use another user name to uninstall Ziguang pinyin. If the fault persists, you should recreate the user name, back up the information under the original user name, and delete it.
L blue screen solution
Generally, the causes of blue screens are concentrated on incompatible hardware and drivers, problematic software, and viruses. The following methods can be taken to eliminate such problems:
1. Force restart
Sometimes only a program or driver makes a mistake at the moment. After the restart, they will change themselves. (Note: See 7. Query the shutdown code at this time)
2. Check for new hardware
First, check whether the new hardware is firmly inserted. The problem that is ignored by many people may lead to many inexplicable faults. if there is no problem, unplug it, try another slot, and install the latest driver. at the same time, check whether the hardware is compatible with the operating system against the hardware compatibility category on the Microsoft website. if your hardware is not in the table, you can query the website of the hardware manufacturer or call their phone number.
Windows XP Hardware Compatibility List: http://support.microsoft.com/default.aspx? Scid = kb; zh-cn; 314062
Windows 2 K hardware compatible Category: http://winqual.microsoft.com/download/display.asp?
3. New drivers and services
If you have just installed a new hardware driver or a software, and it has added the corresponding project to the system service (for example: anti-virus software, CPU cooling software, firewall software, etc.), blue screen failure occurs during restart or use. Please uninstall or disable them in safe mode.
4. Check for viruses
For example, viruses such as shock waves and ripple waves may sometimes cause Windows blue screens to crash, so virus detection and removal are essential. At the same time, some Trojan spyware may also cause blue screens, so it is best to use related tools for scanning and inspection.
5. Check BIOS and hardware compatibility
For newly installed computers that often encounter blue screen problems, you should check and upgrade the BIOS to the latest version, and disable memory related items, such as cache and ING. In addition, check your hardware against Microsoft's hardware compatibility list. In addition, if the motherboard BIOS does not support a large-capacity hard disk, it will also lead to a blue screen and need to be upgraded.
6. Check system logs
In the start-run menu, enter EventVwr. msc. When you press enter, the "Event Viewer" appears. Check "system log" and "application log" for "error" items.
7. Query the shutdown code
Write down the dense English code on the blue screen and access the Internet on other computers to enter the Microsoft help and support website.
Http://support.microsoft.com, enter the stop code in search (knowledge base) in the upper left corner, if the search result does not
Suitable information. You can search for the English knowledge base. in general, we will find useful solutions here. in addition, the blue screen stop code or subsequent instructions in search engines such as baidu and Google are used for keyword search, and there are often some other gains.
8. The Last correct configuration
Generally, the blue screen appears after the hardware driver is updated or the hardware is added and the driver is installed, in this case, the "last correct configuration" provided by Windows 2 K/XP is also a shortcut to solve the blue screen.
9. Install the latest system patch and Service Pack
Some blue screens are caused by Windows defects, which can be solved by installing the latest system patch and Service Pack.
L fixed an error in the pop-up disc when reading the disc
Sometimes there are programs or files in the disc that are being processed and opened. After the optical drive is forced to pop up, an error window cannot end, in this case, you only need to re-place the disc into the optical drive [retry] or press the "ESC" key to cancel the operation.
L suddenly cannot access the network
When the network connection is normal, sometimes IE or QQ prompts a network connection error, which usually occurs after the firewall is upgraded, therefore, you only need to check whether the firewall has disconnected the network. If yes, enable the firewall.
L automatic system restart
1. If a prompt box pops up and the shutdown countdown is performed, it is a virus in the system. Currently, this is a virus variant of the "shock wave". Generally, anti-virus software cannot be killed, only install the latest patch in security mode;
2. Restart without any prompts during use, which may be:
The system file is damaged and must be repaired and installed;
If the power supply voltage is unstable or the power supply is insufficient, consider replacing the new power supply or checking the plug-in and installing a regulated power supply.
The golden finger in the memory has poor oxidation contact. After the memory is turned off, it is pulled out and wiped.
Poor cooling of CPU and chassis, consider improving the cooling environment.

What should I do if I cannot shut down

1. Black screen cannot enter the system when the boot screen flashes
This is usually caused by boot file corruption or the loss of the graphics card driver file
Solution: Select [security mode] to enter the system, right-click [my computer]-[manage]-[Device Manager], find the [display card] to expand and delete the driver and reinstall it.

2. The guiding scroll bar does not move to the system.
Generally, the boot progress bar does not have any movement, and the system cannot enter
Solution: If the system boot file is lost or the hardware fails to be detected, first confirm that the hardware connection is normal, and then restart the system. When the BIOS detects the hardware and starts to enter the system boot, press F8, when the system selection menu is displayed, we select the [last correct configuration] mode, this mode usually plays a recovery role when the system boot file or core configuration is too haircut. If the system can smoothly enter the system, the fault will be rectified. If the fault persists, the system should be reinstalled.
3. Abnormal and slow access to the system.
This is mainly because abnormal hardware or excessive system junk files are detected during the system boot process, resulting in insufficient disk space.
Solution: Check whether there are exceptions with the connected peripherals, whether too many drivers are mounted, and then go to [safe mode] to delete junk files and organize the disks.
4. The desktop cannot be displayed after you enter the login user name and password
It is usually because an error occurs with the system startup file or the antivirus software program is damaged.
Solution: In this case, you can only restart and enter [security mode] to run-MSCONFIG to start [system configuration utility]-cancel the startup file of the startup item and search to delete it, if the anti-virus software fails, uninstall it and reinstall it to solve the problem.