What if the computer can't be turned off normally and can't be turned on?

1. Try to turn on the computer. After the computer brand is finished, press F8, safe mode, cursor selection: last correct configuration, enter, enter, and press.

2. Enter the safe mode, enter the car, and after reaching the desktop, use Jinshan first aid kit to kill virus. Check Jinshan first aid kit: check the extended scanning box to scan immediately, deal with it immediately and restart the computer.

3. Unplug the video card and memory stick, eraser, brush it again, clean the slot dust and fan, and replace the memory stick.

4. Check whether there are similar functions and redundant similar software, such as multiple players and antivirus software. Uninstall redundant software, leaving only one, because similar software is incompatible with each other.

5. Download the Driver Wizard and upgrade: graphics card driver.

6. If it doesn't work, you need to "restore with one button" or "reinstall the system".

7. If there is something wrong with the hardware, send it for repair.

Introduction:

Computer, commonly known as computer, is an electronic computer for high-speed calculation, which can be used for numerical calculation, logical calculation and memory storage. It is a modern intelligent electronic device that can run according to the program and automatically process massive data at high speed. It consists of hardware system and software system, and a computer without any software is called bare metal. It can be divided into five categories: supercomputer, industrial control computer, network computer, personal computer and embedded computer. More advanced computers include biological computers, photonic computers and quantum computers.

John von neumann, the inventor of the computer. Computer is one of the most advanced scientific and technological inventions in the 20th century, which has had an extremely important impact on human production and social activities, and has developed rapidly with strong vitality. Its application field has expanded from the initial military scientific research application to all fields of society, forming a huge computer industry, promoting global technological progress and triggering profound social changes. Computers have spread all over ordinary schools, enterprises and institutions, entered the homes of ordinary people and become an indispensable tool in the information society. The application of computers is becoming more and more common in China. After the reform and opening up, the number of computer users in China has been increasing, and the application level has been improving, especially in the fields of Internet, communication and multimedia. From 1996 to 2009, the number of computer users increased from 6.3 million to 6,765,438+million, and the number of networked computers increased from 29,000 to 59.4 million. The number of netizens has reached 3160,000, and there are 670 million mobile users of wireless Internet, among which the number of mobile Internet users has reached1.170,000, ranking first in the world.

Features:

1, fast operation.

At present, the operation speed of computer system has reached trillions of times per second, and the microcomputer can reach hundreds of millions of times per second, which has solved a lot of complicated scientific calculation problems. For example, the calculation of satellite orbit, dam, 24-hour weather forecast and so on. In the past, manual calculation took years and decades, but now it takes only a few days or even minutes to complete with a computer.

2, the calculation accuracy is high

The development of science and technology, especially the development of cutting-edge science and technology, requires highly accurate calculation. The reason why the missile controlled by computer can accurately hit the intended target is inseparable from the accurate calculation of the computer. The average computer can have a dozen or even dozens of significant bits (binary), and the calculation accuracy can range from a few thousandths to a few millionths, which is beyond the reach of any calculation tool.

3. Have the ability of logical judgment

With the increase of computer storage capacity, more and more information can be stored and memorized. Computers can not only calculate, but also save data, programs, intermediate results and final results for users to call at any time; You can also perform arithmetic and logical operations on various information (such as language, characters, graphics, images, music, etc.). ) through coding technology, even reasoning and proof.

4, have the ability of automatic control

The internal operation of the computer is automatically controlled according to people's pre-programmed programs. Users design running steps and programs in advance according to the needs of solving problems, and the computer runs in strict accordance with the steps specified in the programs. The whole process is carried out automatically, without manual intervention, and the expected effect of users is achieved.