1. Virus damage
Soon after the computer appeared, computer viruses appeared. When the network becomes the information artery of today's society, the spread of viruses is more convenient, so it also interferes with and destroys our normal work from time to time. A typical example is the "shock wave" virus that caused serious damage to computers around the world some time ago. When the outbreak occurs, you will be prompted that the system will start automatically after 60 seconds. In fact, as early as the DOS era, many viruses can automatically restart your computer.
Whether it is virus damage or not, we can use the latest version of anti-virus software to carry out anti-virus, and generally find the existence of viruses. Of course, there is another possibility that someone maliciously invaded your computer while you were surfing the Internet and implanted a Trojan horse program. In this way, the other party can remotely control all the activities of your computer, including, of course, restarting your computer. For some trojans, it is not easy to remove them, so it is better to reinstall the operating system.
2. The system file is corrupted.
When system files are destroyed, such as KERNEL32.DLL under Win2K, Win98? Basic files such as FONTS in Fonts directory are destroyed when the system is running, so it will be forced to restart when the system is started. You can do an experiment and try to rename the fonts in the WIN98 directory. When you turn it on again, our computer will start again and again.
For this kind of fault, because it can't enter the normal desktop, it can only be installed or reinstalled with cover.
3. Timing software or task planning software works.
If you set a restart or load some working programs in the "Planning Taskbar", the computer will start again. In this case, we can open the "Start" item, check whether there are unfamiliar execution files or other scheduled working procedures, and then filter them before starting the inspection. Of course, we can also directly enter the "Msconfig" command in "Run" to select the startup item.
Hardware reason:
1. The power supply voltage is unstable.
The working voltage range of switching power supply for general household computers is 170V-240V. When the power supply voltage is lower than 170V, the computer will automatically restart or shut down. Because we sometimes don't feel the fluctuation of the mains voltage, we will mistakenly think that the computer will automatically restart for no reason.
Solution: For areas where the power supply is often unstable, you can buy UPS power supply or 130-260 V wide switching power supply to ensure the stable operation of the computer.
2. The plug-in or power socket is of poor quality and poor contact.
Most of the patch panels on the market are of poor quality, the internal contacts are all welded by hand, and acid flux is often used, which can easily lead to open circuit or leakage between live wire and zero wire in future use. Due to manual welding and poor elasticity of the phosphor brass sheet, it is easy to lose elasticity in a short time, resulting in poor contact with the power plug of the host or display, resulting in a large contact resistance, and a large amount of heat will be generated after long-term work, which will be manifested as the restart of the host or the flashing of the black screen of the display.
Another possibility is the wall socket in our home. Most wall sockets are not installed by professionals, so the wiring inside the socket is very irregular. Especially if we often use high-power heaters in these sockets, it is easy to cause internal heating and oxidation to form intermittent power failure, resulting in computer restart or display flashing.
Solution:
(1) Don't buy cheap patch panels to save money. Buy some brand-name patch panels, because their insides are automatically installed and crimped by machines and do not need manual welding.
② As to whether it belongs to the problem of virtual connection inside the wall socket, we can try replacing the host with a wall socket to see if there is the same automatic restart problem.
3. The computer power supply is insufficient or has poor performance.
This situation is also common, especially when we add new equipment to the host, such as replacing high-end graphics cards, adding burners and hard disks, which is easy to appear. When the host computer is working at full speed, such as running a large 3D game, high-speed burning or preparing to read a CD, when it is started, the dual disks will copy data, which may lead to power-off protection and stop output due to instantaneous power shortage. However, when the power supply stops outputting, the load is reduced, and then the power supply is started again. Because the recovery time after protection is very short, the performance given to us is that the host automatically restarts.
On the other hand, the switching power supply of the host has poor performance. Although the voltage is stable and within the normal allowable range, due to the excessive harmonic content in its output power supply, it will also lead to frequent shutdown or restart of the host. In this case, we use a multimeter to test its voltage is normal. It is best to change an excellent power supply.
Solution: Now replace the high-quality and high-power computer power supply.
4. The power plug of the host switch power supply is loose, with poor contact and tight plug.
In this case, most of them will appear on DIY machines. The power cord of the host power supply failed 3C certification and did not match the power socket. When we shake the table or touch the host, the host will automatically restart, usually accompanied by a slight electric spark.
Solution: Replace the high-quality 3C certified power cord.
5. The ATX20 socket of the motherboard power supply is soldered in vain, and the contact is poor.
This kind of fault is not common, but it does exist, mainly because when the host is working normally, move the ATX20 pin plug left and right to see if the host will automatically restart. At the same time, check whether the reed inside the 20-pin power plug is oxidized, which may easily lead to large contact resistance and poor contact, leading to the host computer crash or restart. Sometimes it is necessary to check whether the connecting wire at the tail of the 20-pin plug is firm.
Solution:
(1) If the solder joints of the main board are in virtual welding, repair the welding directly with an electric soldering iron. Note: When welding computer boards such as motherboards, hard disks and video cards, the soldering iron must be grounded properly or unplugged.
(2) If it is a power problem, it is best to replace a good power supply.
6.CPU problem
When some functional circuits in the CPU are damaged and the secondary cache is damaged, the computer can also be started, or even run normally on the ordinary desktop, but it will restart or crash when performing a special function, such as drawing tables, playing VCD and playing games.
Solution: Try to shield L2 or L 1 cache (L 1) in CMOS to see if the host can run normally; Or just change to a good CPU. If it can work normally after shielding, it can still be used It's slower, but it will save money.
7. Memory problems
If a chip on the memory stick is not completely damaged, it is likely to pass the self-test (most of them are set with POST), but it will be restarted unexpectedly because of the function failure caused by the high calorific value of the memory during operation. Many times, when the memory is damaged, the opportunity will call the police, but after the memory is damaged, there will still be faults such as no alarm and no power supply. It is best to use the elimination method, which can quickly determine the fault location.
8. Optical drive problem
If the CD-ROM drive is damaged internally, it will also lead to slow startup or self-test failure of the host, or it may suddenly restart during work. In the latter case, if we replace the optical drive, it is likely that the power consumption of the optical drive will be different. What you need to know is that although the ATPI interface of the optical drive is the same, the pin definitions of different manufacturers are different. If there is something wrong with our hard disk cable, there may be no problem with one brand of optical drive, but other brands of optical drives will not work, so you need to pay attention.
There is something wrong with the quality of 9.9. Reset key.
If the reset switch is damaged, the internal reed is always in the short circuit position, and the host computer cannot power on for self-test. However, when the elasticity of the reset switch is weakened or the buttons on the chassis are not easy to bounce up, it will appear during use, because the chassis is occasionally touched or the host suddenly restarts under normal use. Therefore, when the reset switch cannot be pressed freely, it must be carefully checked, and it is best to replace the new reset button switch or lubricate the external button of the chassis.
In another case, because the insulation layer of the reset switch lead in the chassis is peeled off too much during welding, unpacking many times during use will cause the reset switch lead to get too close, causing collision, which will lead to the automatic restart of the host.
10. Automatically restart when connecting the network card or parallel port, serial port and USB interface to external equipment.
This situation is generally due to peripheral failures, such as printer parallel port damage, a pin short circuit to ground, USB device short circuit to ground, network card work is not standardized. When we use these devices, the computer will restart because of a sudden short circuit.
Other reasons:
1. Poor heat dissipation or temperature measurement failure.
The CPU has poor heat dissipation, and the common problems are that the fixing clip of the CPU radiator falls off, there is a foreign body between the CPU radiator and the CPU, and the CPU fan has been used for a long time and the radiator has accumulated too much dust. These conditions will lead to poor heat dissipation of CPU, and the accumulated temperature will automatically restart if it is too high.
Also, is the temperature probe under the CPU broken or P4? The internal temperature measuring circuit of CPU is damaged, and the BIOS on the motherboard has a BUG, which can not accurately measure the temperature under some special circumstances, which will lead to the automatic protective restart of the host during the work.
Finally, the CPU protection temperature we set in CMOS is too low, which will also lead to the automatic restart of the host.
2. Fan speed measurement failure
When the speed measuring circuit of the CPU fan is damaged or the speed measuring cable is intermittently disconnected, the motherboard may mistakenly think that the fan stops automatically shutting down or restarting because the fan speed cannot be detected, but we may see that the CPU fan rotates normally and the speed measuring is normal when checking.
3. Strong magnetic interference
Don't underestimate electromagnetic interference. Many times, our computer crashes and restarts are also caused by interference. These interferences come from CPU fans, chassis fans, graphics cards, motherboards and hard disks inside the chassis, as well as external power cords, inverter air conditioners and even large equipment such as automobiles. If our host has poor interference performance or poor shielding, the host will restart unexpectedly or crash frequently.
When the delete key is pressed to enter the setup crash, it is often in the process of hardware self-check, which indicates that there is a hardware failure, which has nothing to do with the operating system itself, but which device has problems and needs to be detected by replacement.
Computer crash caused by improper human operation
In many cases, the computer used to run normally, but after the operator did something, it frequently crashed or could not use the computer normally at all.
1, crash after modifying BIOS settings.
Modifying the BIOS is definitely the patent of "super user". Some novice users are eager to learn. After reading some articles, in order to improve and optimize their system performance, they often modify some setting parameters in BIOS, such as hard disk parameters, memory parameters, CPU parameters, chipset parameters and so on. However, some technical articles are wrong in themselves, and the meaning expressed is easily misunderstood or the scope of application is limited. When the default settings of the computer are modified, the system becomes unstable and often crashes, but at the same time it can't enter the Windows system at all. For this kind of fault, it is usually only necessary to modify the BIOS settings accordingly or simply restore the default values.
2. Deleting system files by mistake leads to system crash.
Some important system files in the "C:\Windows" directory and its subdirectories are deleted by mistake or accidentally lost or damaged, which will lead to frequent crashes or the system cannot enter at all. For this kind of fault, it is sometimes difficult to recover the system directly. The simplest solution is the cover the installation window, that is, reinstall Windows in the original installation directory without formatting the Windows partition.
3, abnormal shutdown caused by the crash
If there is no automatic shutdown program for Windows, usually an illegal shutdown will not cause much harm (because the probability of failure is not great), but if it is illegal for a long time, it may cause file damage and loss, unstable system operation and even hardware damage. In addition, sometimes this illegal shutdown is likely to cause logical errors in the hard disk and frequent crashes. Fortunately, after the illegal shutdown, the system will automatically scan the disk, correct errors and eliminate hidden dangers, but some people will skip it and prevent the system from checking automatically. It is recommended not to do this, or you will regret it if there is a track with bad logic.
4. Hot-plug hardware equipment leads to crash.
With the development of science and technology, many devices now support hot plug, such as USB devices and 1394 devices. However, according to practical experience, most hardware operations should be completed in the power-off state, otherwise it is likely to cause system crash or even permanent hardware damage. The crash caused by hot plug can make the system run again by restarting the computer without causing hardware damage. However, it is recommended not to hot plug conventional hardware devices. After all, for individual users, "security" is paramount.
5, overclocking caused the crash.
Many DIY experts like to overclock all kinds of hardware, some are single CPU, some are super everything. Taking CPU overclocking as an example, the speed of CPU accessing data in memory is faster than the speed of exchanging data between memory and hard disk. Overclocking makes this contradiction more prominent, exacerbates the situation that the required data cannot be found in memory or virtual memory, and will lead to "abnormal errors". In addition, if you run large-scale software (such as 3D games) for a long time or multitask after overclocking, the temperature of the CPU chip is likely to exceed the normal working range, leading to system crash or restart. Excessive temperature may also cause electrons to drift and damage CPU. So overclocking can improve the system performance, but it will also reduce its stability. Of course, the solution is just to reset the operating frequency of each device to the default value. If it must be exceeded, the cooling system must be checked regularly or the cooling work must be strengthened. When overclocking, the frequency should not be too high, and do not pursue overclocking in summer.
Second, some software caused the computer to crash.
1. After installing a certain software, it will crash as soon as it runs.
Sometimes, when we install a software that is very strict with the system or a special software, it is easy to appear this phenomenon. At this time, we will suspect that there may be a problem with software and hardware compatibility. Of course, sometimes the old operating system will also lead to such software and hardware compatibility problems. You can try to upgrade the operating system first or simply give up (uninstall) the software and use other similar software.
2. The dynamic link library file is lost, resulting in a crash.
The file with the extension of DLL is a dynamic link library file, which plays a very important role in the Windows operating system. These files are essentially * * * files, that is, a DLL file may be called by multiple softwares at runtime. If we delete a software with imperfect uninstallation program, the anti-installation program of the software will record the files it has installed and prepare to delete them one by one. At this time, it is easy to see that the deleted dynamic link library file will also be used by other software. Generally speaking, the dynamic link library file used by a software will be copied to the computer when installing the software, so reinstalling the corresponding application software can solve the problem of losing the dynamic link library.
3. Too many random programs will cause inexplicable crashes.
The system resources consumed by each computer after booting are different, mainly due to the different startup items loaded by each computer. The amount of system resources directly affects the stable operation of the machine. Loading too many startup items during computer startup will greatly slow down the startup speed of the system, which is often the most typical root cause of system crash. The solution is also very simple, that is, to minimize the random startup program of the system. Type msconfig in the start menu "Run", run the command dialog box, and then press enter to open the System Configuration Utility screen. Keep the options that must be kept, and choose unnecessary and meaningless options.
4, the use of trial version, beta software caused by the crash.
With the popularity of the Internet, many people like to download all kinds of software from the Internet to use, but many of them are trial versions or beta versions. The purpose of this software is to let users check its reliability and stability, so as to make appropriate improvements when it is officially released. So it usually has some bugs or is not stable enough in some ways. If you often or occasionally crash after installing a certain kind of software, you might as well try to uninstall it, and usually the fault will be solved.
5. Illegal uninstallation of the software causes the machine to crash.
When uninstalling software, do not directly delete the directory where the software is installed. If you delete it directly, there will be a lot of garbage in the registry and Windows directory. Over time, the system will become unstable, leading to a crash.
6, software conflict caused by the crash
As more and more softwares are developed by different software companies, and it is impossible for these softwares to be fully familiar with and cooperate with each other in the development process, it is easy for everyone to call the same DLL or the same physical address at the same time when running these softwares together, thus causing conflicts. At this time, the computer system doesn't know which request to give priority to, which leads to system disorder and computer crash.
7. Incorrect software upgrade
Most people may think that there will be no problem with software upgrade. In fact, some components will be upgraded during the upgrade process, but when other programs may not support the upgraded components, it will lead to a crash. Therefore, when upgrading the software, we should also pay attention to the operation, first understand the characteristics, performance and troubleshooting methods of the upgraded software before upgrading.
8. A crash occurred after updating the hardware driver.
In order to improve hardware performance, hardware manufacturers often upgrade hardware drivers. But sometimes the driver of one hardware device conflicts with the new driver of another device, or the new driver itself has a BUG, or the new driver downloaded from the Internet is damaged, or the new driver may have a version conflict with a file in the system, resulting in a crash. Because there are many possibilities to cause this fault, we should solve it accordingly. For example: start in Safe Mode, and then check the adjustment in Device Manager; Or try downloading this new driver from other places.
9. Too little remaining space on the hard disk or too much disk fragmentation can also lead to "crash" failure.
Because some large applications need a lot of memory when running, if the physical memory is insufficient, you need to use the virtual memory on the hard disk. At this point, if the remaining space on the hard disk is too small, it may cause a crash. In addition, if your computer doesn't tidy up the hard disk for a long time, it will make the system resources tense and crash. Of course, if there are too many junk files in the hard disk, it will also make it difficult for the hard disk to find files and lead to a crash. This kind of fault is also special-it usually stops suddenly when the hard disk is continuously "crazy" to read and write. So you'd better set the virtual memory in a partition with a large remaining space, and regularly clean up all kinds of junk files and defragment the disk.
Third, some hardware caused the computer to crash.
1, dust "killer" causes frequent crashes.
2. The computer crashed because of poor internal heat dissipation.
3. There is a conflict in memory, resulting in a crash for no reason.
5, the use of inferior accessories led to frequent crashes.
6, hard disk failure caused by the crash
Fourth, the virus caused the computer to crash.
1, crashed due to computer virus infection.
2. The system often crashes after using virus real-time monitoring software or firewall.
Many people simply load multiple virus real-time monitoring software or firewalls on their machines for fear of computer damage. Different kinds of antivirus software and virus firewall will run at the same time, which may even cause users to crash without a chance to shut down these software systems. Generally speaking, using well-known antivirus software can protect computers from viruses. What we need to do is to upgrade its virus database in time.
Five, individual multimedia applications lead to computer crashes.
Multimedia computer can bring people into a colorful world, but it requires high conditions. It needs a high-performance computer, rich system resources, non-conflicting hardware settings, drivers and graphics cards that support acceleration functions, and playback software with high decoding efficiency. Otherwise, constant failure will bring you great trouble.
1, software and hardware are difficult or incompatible.
2. It always crashes when playing high-quality videos.
Playing video requires high software and hardware environment. First of all, you should use excellent media playing software such as Storm Video, realone, V8 and media player. , and then upgrade DirectX to a higher version according to the function of the machine graphics card, update the graphics card driver, and install the appropriate decoder. Generally speaking, the crash can be eliminated. In addition, because the video file is relatively large, it will take a lot of time to load. At this time, the computer may have a fake crash and will return to normal after a while.
3, watching DVD is easy to crash
At present, even manufacturers and hardware media have no clear explanation for watching DVD-ROM crash. It seems that this problem is more complicated. The main reasons for watching DVD crash are: for example, there are some problems in power management of some old motherboards ACPI, and sometimes soft decompression software can't disable screen saver and sleep state. , causing the system to crash when it enters the power saving state. For another example, the IDE drivers of some VIA/SIS chipset motherboards are old, or they are not perfect compared with these chipsets, resulting in the CD-ROM drive crashing in DMA mode. In addition, some optical discs have uneven surfaces. Because DVD-ROM needs more discs, there will be many random crashes. In addition, the advanced power management problem of ACPI caused an unfounded and unreasonable crash.