The 26 letters of the keyboard do not know how to type, and now you can only use the 18 letters of q

Some of the keyboard keys on the keyboard are out of order, which is a key failure without any regularity.

Caused by the failure of some keys of the keyboard, most of this situation is the failure of the internal circuit board of the computer keyboard, this phenomenon is generally due to the dirt on the road board or conductive plastic, so that the two can not be connected normally. Other factors are also possible, such as: damaged keyboard plug, faulty wiring, damaged motherboard, CPU not working properly, etc., but they are not the main cause.

1 Disassemble the keyboard. Note that when opening the keyboard, be sure to turn the button side (that is, the side we operate) down and the circuit board up, otherwise the conductive plastic on each key will fall off one after another, causing trouble for your repair.

2 Open the circuit board, the circuit board is generally made of soft plastic film, engraved with key lines, with a concentration of more than 97 alcohol cotton (75 medical alcohol cotton can also be used, because I have used it, but it is best to use high concentration of alcohol cotton) gently ** road board scrubbed twice. Take care of the key failure part of the circuit several times.

3 Check the conductive plastic of the failed part of the button, if there is a lot of dirt on the upper area, also use alcohol scrubbing. Assuming that the conductive plastic is damaged, then the author suggests that you can replace the conductive plastic on the infrequently used keys to the damaged part, although this "tear down the east wall to make up the west wall" measure can not make the keyboard play all the functions, but at least can extend the life of the commonly used keys.

4 Remove the dirt in the inner corners of the keyboard, tools can be brushes, small brushes, etc., but pay attention to the action should be gentle.

5 Check whether the soldering module has false soldering or desoldering, and if you use an electric soldering iron, you can do repair soldering work. Of course, this step is only applicable to friends who can use an electric soldering iron, and friends who can't use it, please skip this step.

6 Install the keyboard. One thing to note here is that you must wait until the alcohol has evaporated.

It's the notebook keypad that is turned on, and it's okay to close it.

How to turn off the keypad" on it.

Hopefully, thank you.

The keyboard is not in good contact and can be repaired.

The operating system (OS) is the management of all the hardware resources of a computer system, including software resources and data resources. control program operation; improve the human-machine interface; Provide support for other application software, etc., so that all the resources of the computer system can be used to the maximum extent, and provide users with a convenient, effective and friendly service interface.

The operating system is usually the layer of system software closest to the hardware, which transforms the hardware bare metal into a fully functional virtual machine, making the use and management of the computer system more convenient, the utilization of computer resources is more efficient, and the upper-layer applications can get more support than the functions provided by the hardware.

The operating system is a huge management and control program, which roughly includes five management functions: process and processor management, job management, storage management, device management, and file management. At present, the common operating systems on microcomputers are DOS, OS 2, UNIX, Xenix, Linux, Windows 2000, NetWare, etc.

Computer resources can be divided into two main categories: hardware resources and software resources. Hardware resources refer to the hardware equipment that makes up a computer, such as processors, main storage, tape storage, printers, monitors, keyboard input devices, etc.

Software resources mainly refer to various data and programs stored in a computer. The hardware and software resources of the system are allocated and scheduled by the operating system according to certain policies according to user needs.

The processor management of the operating system alternately assigns processors to programs within the system that are waiting to run according to a certain policy.

The device management of the operating system is responsible for assigning and ** external devices, as well as controlling the operation of external devices as required by the user program.

The file management of the operating system provides users with the ability to create files, undo files, read and write files, open and close files, and so on.

The storage management function of the operating system is to manage memory resources. It mainly realizes memory allocation and storage, storage protection and memory expansion.

The job management function of the operating system is to provide users with a good environment to use the system, so that users can effectively organize their workflows and make the whole system run efficiently.

Common operating systems are: Win98 WinMe Win2000 WinNT Win2003 There are multiple versions of Win200. The most common ones are the previous ones.

There's also DOS, and there's the Linux operating system. This is a network operating system. There is also windowsce, which are generally not commonly used.

There are too many of the above.,Take a look for yourself.,The addition is,64-bit system needs 64-bit hardware support,It's not as good as the CPU needs to be 64-bit.,It's not more than how much the main frequency is installed on 64-bit.,There's no such thing.。 A minimum of 15G is required for the C drive. Nothing else.

Not necessarily.

The hardware requirements for the same operating system remain basically the same.

The hardware system of a computer based on the von Neumann working mode consists of five parts: combinator, controller, memory, input device, and output device. From the appearance, the microcomputer is composed of a host computer (including a motherboard, CPU, memory, graphics card, sound card, hard disk and optical drive placed in the main chassis) and peripheral devices (including monitors, keyboards, mice, headsets, etc.). At present, the common operating systems are:

1) DOS: Disk operating system, which belongs to a single-user, single-task, command-line, real-time operating system. （2）windows：

Graphical interface, single-user, multi-tasking, real-time operating system in the form of windows. (3) UNIX: time-sharing operating system, supporting multi-user.

4) Windows NT and NetWare: Network operating systems.

The hardware system consists of two parts:

1. Host part: including motherboard, CPU (** processor), memory, various boards (sound card, graphics card, decompression card, etc.), hard disk, floppy drive, optical drive, chassis, power supply, etc.

2. Peripherals: Commonly used include monitors, keyboards, mice, printers, scanners, digital cameras, etc.

The basic hardware of a home computer is a host computer, a monitor, a keyboard and a mouse, and the host hardware is a motherboard, CPU, memory, graphics card, hard disk, and optical drive, and the most common operating system is Windows XP Vista 2003 7, and the operating system is composed of computer languages

It can be understood this way. It's all about what works for us in the end. The operating system is like the management office of a wet market.

And the hardware is like a house setup in our wet market. The management office is responsible for allocating the use of these housing settings and is responsible for driving the stalls to the stall owners. We buy things, no matter how we go to buy them.

Just buy your own stuff. All you need to do is install your own software.

It is to allow people to achieve the purpose we want to do through the operation of the mouse or keyboard, because we cannot directly operate the hardware, there is an intermediate medium of the operating system, so that we can operate directly, and then the operating system is going to operate the hardware.

Quite right, it's good to understand that.

The following are (d) that belong to the software.

The software is composed of programs, of course, D.

Now that the floppy disks are all out, your computer test questions haven't been changed?? This education is really backward!! Speechless!

Most of the operating systems are written in C, and only a small part of them are.

The core part is written in assembly language, which may be more efficient for implementation. When the operating system is loaded into memory to run, in fact, those written in C language and assembly language are converted into binary**, that is, machine language, in fact, any software must be converted into machine language to make the computer run. Binary** In the machine, the voltage is actually expressed by the high and low voltage, the voltage is high for 1, and the voltage is low for 0.

With this knowledge, you will look at the question you asked, you said that when the operating system executes the shutdown command, how does the software control the hardware to power off, in fact, when you click the shutdown button, it is to send a command to the operating system, and the representation inside the computer is also under your click, which produces a set of high and low voltages (or may be full high voltages, or all low voltages, in short, a group of voltages), this set of voltages will control the operating state of the host, Let the host know what you're giving it, and it will execute it, and you'll see the computer shut down! In a word, the computer runs high and low voltages, and all your operations, as well as the operation of the computer operating system and application software, are controlled by the voltage of the hardware. For more details, you can refer to the book on computer principles! ]

Use the hardware by calling the driver file to give different instructions to the hardware If the driver relay is missing, the system will not be able to call the hardware It's purely yy wrong don't spray].