Computer blue screen reason quick query

A crash is a headache for the operator. When the system crashes, the system cannot be started, the screen is frozen, the mouse and keyboard cannot be input, and the software is interrupted abnormally. Although there are many reasons for the crash, the root cause is never the same as hardware and software.

1. Hardware-related crashes

[Poor heat dissipation]
Monitor, power supply, and CPU are very hot at work, so maintaining good ventilation is very important. If the monitor is overheated, it will lead to color, image distortion or even shorten the display life. Working too long will also lead to poor power supply or display heat dissipation and cause computer crash. The cooling of CPU is an important issue related to the stability of computer operation, and is also the "hardest hit" of heat dissipation failures ".
[Improper migration]
In the process of moving a computer, a great amount of vibration often causes the machine's internal devices to loosen, leading to poor contact and computer crashes. Therefore, violent vibration should be avoided when moving the computer.
[Dust killer]
Too much dust in the machine will also cause a crash. If the soft drive head or optical drive laser head is contaminated with excessive dust, it will lead to read and write errors, serious will cause the computer to crash.
[Device mismatch]
If the clock speed of the motherboard does not match the CPU clock speed, when the old motherboard is over-frequency, the external frequency is set to be too high, and the operation stability may not be guaranteed, resulting in frequent crashes.
[Hardware and software incompatibility]
3D software and some special software may not start or even be installed on some computers, and there may be problems with software and hardware compatibility.
Memory failure]
It is mainly caused by loose memory, virtual soldering, or memory chip quality. Memory stick contact faults should be ruled out according to specific circumstances. If there is a problem with the memory stick quality, the memory should be replaced to solve the problem.
Hard Disk fault]
This is mainly because the hard disk is aging or the bad sectors and sectors are caused by improper use. In this way, the machine will easily crash during running. You can use special tools and software for troubleshooting. If the damage is serious, you can only replace the hard disk. In addition, for boards that do not support udma 66/100, you should pay attention to the setting of the hard disk running mode in CMOS.

2. software-related crashes

[Improper software upgrade]
Most people may think that the software upgrade will not be a problem. In fact, some components shared during the upgrade process will also be upgraded, however, other programs may not support the upgraded components, resulting in various problems.
[Misuse of beta software]
It is best to use less test versions of the software, because the testing software usually carries some bugs or is not stable enough in some aspects. After using the software, program errors, crashes, or the system cannot be started.
[Uninstall software illegally]
Do not delete the directory where the software is installed directly. If you delete the directory directly, there will be many ** in the Registry and Windows directory. Over time, the system will become unstable and cause a crash.
[Use pirated software]
These software may hide viruses. Once executed, it will automatically modify your system and cause the system to crash.
[Application Software defects]
This is common, such as running 16-bit applications that run well in DOS or Windows 3.1 in WIN 98. Windows 98 is 32-bit. Although it is known as compatible, it cannot be coordinated with 16-bit applications in many places. There are also some situations, such as the peripherals that are normally used in Windows 95. After the operating system is upgraded, problems may occur, causing the system to crash or fail to start normally. In this case, find the new driver of the peripherals.
Too many programs are started]
This causes system resources to be exhausted, so that the data required by individual programs cannot be found in the memory or virtual memory, and an exception or error may also occur.
Illegal operation]
The computer crashes if the program is opened or released in an invalid format or parameter. Be sure to keep in mind the correct format and related parameters, and do not open or release unfamiliar programs at will.
Disable the computer abnormally]
Do not directly use the power button in the chassis. Otherwise, system files may be damaged or lost, causing Automatic startup or running crashes. For Windows 98/2000/NT and other systems, this is very important. If it is serious, it will cause a system crash.
[Memory conflict]
Sometimes all kinds of software are running normally, but suddenly they are inexplicably crashed. After restarting, these applications run normally, which is a false crash. Most of the causes are Windows 98 memory resource conflicts. As you know, the application runs in the memory, and the memory space can be released after the application is disabled. However, some application software cannot completely release the memory even after it is disabled due to design reasons. When the current software needs to use this memory address, there will be conflicts.
[Accidental deletion of system files]
Windows 9x requires command.com, Io. sys, msdos. sys, and other files to be started. If these files are damaged or deleted by mistake, it will be useless even if the hardware settings in CMOS are correct. Solution: Use the boot disk of the same operating system to start the computer, type "sys C:", and re-transmit the system file.
[Initialization file damaged]
Because Windows 9x requires reading the system. ini, win. ini, and registry files, if the config. sys and autoexec. BAT files exist, the files will also be read. As long as there are error messages in these files, they may crash, especially the four files system. ini, win. ini, user. dat, and system. dat are particularly important.
[Dynamic link library file (DLL) loss]
In Windows, there is also a type of file, which is also very important. This is the dynamic link library file with the dll extension. These files are shared files in nature, that is, a dll file may have multiple software that needs to be called during running. If we delete an application, the software's anti-installation program will record the files it has installed and be prepared to delete them one by one, at this time, it is easy to see that the deleted dynamic link library file will be used by other software at the same time. If the lost link library file is a key link file, then the system will crash or even crash. We can use tool software such as "Super Rabbit" to delete useless DLL files, which will avoid accidental deletion.
Disk space is too small or there are too many fragments]
If there is too little space left on the hard disk, because some applications require a large amount of memory to run, virtual memory is required, and virtual memory is provided by the hard disk, therefore, the hard disk must have enough space to meet the virtual memory requirements. At the same time, users should also develop a good habit of regularly organizing hard disks and clearing ** files on hard disks.
[BIOS upgrade failed]
You should back up the BIOS to prevent accidents. However, if your system needs to upgrade the bios, it is best to determine whether your BIOS version matches your PC before the upgrade. If the BIOS upgrade is incorrect or an unexpected power failure occurs during the upgrade, your system may not be able to start up. Therefore, you must understand the BIOS model before upgrading the BIOS. If you can back up the current BIOS using the BIOS upgrade tool, copy the previous BIOS to the disk. It also depends on whether the system supports BIOS recovery and how to recover it.
[CPU overclocking]
The overclocking improves the CPU operating frequency and may also cause unstable performance. The reason is that the speed at which the CPU accesses data in the memory is faster than the speed at which data is exchanged between the memory and the hard disk. overclocking makes this contradiction more prominent, as a result, the required data cannot be found in the memory or virtual memory, and an "Exception error" may occur ". The solution is also relatively simple, that is, to let the CPU back to the normal frequency.
[Hardware resource conflict]
An Exception error occurs because of conflicting settings of the sound card or display card. In addition, interruption of other devices, DMA or port conflict may lead to exceptions in a few drivers, resulting in a crash. The solution is to start in "safe mode" and make appropriate adjustments in "Control Panel"> "system"> "device management. You can modify the registry if an exception occurs in the driver. Select "run", type "Regedit", enter the Registry Editor, and use the "Search" function in the menu, find and delete all "primary keys" and "key values" related to the driver prefix string, and restart.
[Insufficient memory capacity]
The larger the memory capacity, the better. It should be no less than 0.5 of the hard disk capacity ~ 1%. If this problem occurs, replace the memory stick with the largest capacity possible.
[Inferior parts]
When a few unscrupulous merchants assemble compatible computers for customers, they use inferior boards, memory, and some even sell fake boards and remark CPU and memory. Such machines are unstable during operation, it is inevitable that the system crashes. Therefore, users should be cautious when purchasing the machine, and use some newer tools and software to test the computer, test the machine continuously for a long time (such as 72 hours), and strive for as long as possible warranty time.

Iii. crash caused by special reasons

Virus Infection]
Viruses can cause a sharp drop in computer productivity, resulting in frequent crashes. At this time, we need anti-virus software, such as Kingsoft drug overlord, for comprehensive drug detection and anti-virus, and to regularly Upgrade anti-virus software.
[Incorrect CMOS settings]
This fault is common, such as hard disk parameter setting, mode setting, and memory parameter setting, which causes the computer to fail to start. For example, if you set the memory without the ECC function to have the ECC function, a memory error may cause a crash.