It may be caused by too much dust in the CPU fan. It is suggested to clean the dust on the CPU fan and heat sink, and add new silicone grease to dissipate heat. If there is something wrong with the fan, please replace it with a good fan that turns higher. Preparation before cleaning the dust on the CPU fan: silicone grease (available in computer city, up to 5 pieces per tube), small brush (the kind used for painting, with slightly stiff hair), waste toothbrush, wet paper or paper towel. An electric fan. The process is as follows: first, remove the heat sink together with the fan head (it is best to press the clip by hand, or remove it with a screwdriver if it is not available), then clean up the residual heat dissipation silicone grease at the bottom of the heat sink and CPU core, then remove the fan head from the heat sink, and then clean up the heat sink with a brush (or toothbrush, as the case may be). When the dust on the heat sink can't be brushed off with a brush, take it to the faucet and wash it well. Then dry it with a tissue. Put it in front of the electric fan to dry. Then brush the fan head with a brush and toothbrush, and finally wipe off the dust on the fan head with a paper towel. After the heat sink is completely dried, install the fan head, coat the CPU core with a suitable layer of heat dissipation silicone grease, and then carefully fasten the fan as a whole to make the fan completely clean. Before installation, it is strongly recommended to check whether the fan head has reached its service life and turn the fan page gently by hand. If the rotation is flexible, it will rebound when it stops, which proves that the fan has reached the prime of life and has good heat dissipation performance. On the contrary, it is necessary to replace the fan head as a whole (you can take your existing fan to the computer city to choose one when replacing it). If you have strong hands-on ability, you can remove the fan head of the hair shaft, take off the trademark tape on the back and drop 2 drops of engine oil. Then stick the tape on it, or stick it with a small piece of ordinary transparent tape. Go to the device manager to see if there are any conflicts between various drivers, and if there are any yellow ones! If the device driver may be incompatible with the system; Then delete the drivers of sound cards, video cards, network cards and other devices, and then install the drivers one by one. Restart the computer every time you install a device, and check which device's driver caused the failure. After finding out, download the new driver of the faulty equipment and then install it. Then clean up the dust in the computer, clean the memory, graphics card and other equipment, and reinstall the memory and other equipment. When running some program software, there is a card or crash fault. Generally, the causes of failure when running some program software are: virus infection, loss of dynamic link library files (. DLL)DLL files, too little or too many fragments left on the hard disk, improper software upgrade, illegal software uninstallation or misoperation, too many startup programs, conflict of hardware resources, poor heat dissipation of CPU and other equipment, etc. When running some program software, the solution to the crash fault is as follows. (1) First, check whether there are too many programs open on the computer. If so, close the program that is not used for the time being, and then check whether it is normal. (2) If it is abnormal or there are not many open programs, then check whether a software has been upgraded. If it has been upgraded, uninstall and reinstall the software. (3) If the software has not been upgraded, check whether the software has been illegally uninstalled or mishandled. If so, please reinstall the software. (4) If there is no software uninstall or misoperation, then use anti-virus software to kill the virus and see if there is any virus. If there is a virus, it may be caused by a virus. Just kill it directly. (5) If there is no virus in the computer, then check whether the hard disk space is too small. If so, delete the unused files and defragment the disk. (6) If the hard disk space is not small, then check whether the crash is regular. For example, the computer always crashes after running for a period of time or when running other large-scale game software, which may be caused by poor heat dissipation of CPU and other equipment. Open the chassis, and check whether the fan of CPU rotates and how the wind is. If the wind power is insufficient, replace the fan in time to improve the heat dissipation environment. (7) If the heat dissipation of the computer is good, then use the hardware test tool software to test the computer to check whether it crashes due to poor hardware quality, and if so, replace the equipment. (8) Finally, check whether there are conflicting hardware devices (conflicting devices are generally marked with yellow "!") In the device manager), if there is, delete it or reset its interrupt. When using the equipment, a crash occurred. The solution to the crash fault when using the equipment is as follows. (1) First, check whether the faulty hardware equipment is in good contact. If the faulty hardware device has poor contact, reconnect the faulty hardware device. (2) If the faulty hardware equipment is in good contact, find out whether the hardware is hot-swapped, and if so, restart the computer. (3) If there is no hot plug operation, then delete the driver of the faulty hardware device, reinstall the latest driver of the faulty hardware device, and check whether it is normal after installation. (4) If the fault still exists, it may be a device driver problem, or the faulty hardware device is aging or incompatible with other devices. Use alternative methods to detect incompatibility and aging of hardware devices and troubleshoot them. The computer crashed after upgrading. The solution to the computer crash after upgrading is as follows. (1) If the computer crashes after the upgrade, the cause of the crash is generally related to the upgrade. If you are upgrading computer hardware devices (such as memory and hard disk), first remove the upgraded hardware devices and then reconnect them to see if the computer is normal. (2) If the fault still exists, replace the good hardware equipment of the same model and check whether the computer fault disappears. If it disappears, the fault is related to upgrading hardware equipment. (3) If the fault still exists, it may be caused by other problems. Then, according to the above method, the cause of the fault is inquired and the fault is eliminated. (4) If the computer is upgrading the BIOS program or the driver of the hardware device, first restore the upgraded program to the original program, and then check whether it is back to normal. (5) If the fault returns to normal, it is a crash caused by upgrading the software; If the fault still exists, it may be caused by other problems. Then, according to the method described above, find out the cause of the fault and eliminate the fault. Memory fault diagnosis: When it is suspected that the fault is caused by memory problems, the following steps can be followed for diagnosis and elimination. Step 1: First restore the BIOS to the factory default settings, and then start the test. Step 2: If the fault still exists, remove the memory, then clean the dust on the memory and motherboard, and see if the fault is eliminated after cleaning. Step 3: If the fault still exists, then wipe the golden finger of the memory with an eraser, and install the boot test after wiping. Step 4: If the fault still exists, install the memory into another slot and start the test. If the fault disappears, re-check whether the spring piece of the original memory stick is deformed. If there is, just adjust it. Step 5: If the fault still exists after replacing the memory slot, use the replacement method to detect the memory. When good memory is installed on the motherboard, the fault disappears. May be the fault of the original memory; If the fault persists, there is a problem with the motherboard memory slot. At the same time, install the faulty memory on another good motherboard for testing. If it can be used normally, the memory is incompatible with the motherboard; If the same fault occurs on another motherboard, the memory quality is poor or damaged. Excessive installation of antivirus software and excessive opening of monitoring software will also cause the system to run slowly or crash. I suggest you turn off all monitored software. If the system runs fast, you can adjust the monitoring switch appropriately and often kill viruses. The system's own disk repair method: (Hard disk failure can also lead to card or crash failure) The specific steps are as follows (taking WindowsXP as an example). Select the middle drive letter in My Computer and click the right mouse button. In the pop-up drive properties window, select Tools → Start Check, then select Automatically repair file system errors and scan and recover bad sectors, and then click Start. The scanning time will vary depending on the disk capacity and scanning options. Bad hard disk will cause the computer system files to be damaged or lost, and the computer will not start or crash. Hard disk bad track can be repaired by NDD disk tool or disk scan.