A desktop computer is an independent and separate computer that is completely unrelated to other components. Compared to laptops and netbooks, it has a larger volume, and devices such as the host and monitor are generally relatively independent and need to be placed on a computer desk or dedicated workbench. Therefore, it is named a desktop computer. The advantages of desktop computers are durability and affordability. Compared to laptops, they have better configuration and better heat dissipation at the same price. If accessories are damaged and replaced, the price is relatively cheap. The disadvantages are: bulky and high power consumption. A computer is a machine that utilizes electronic principles to process data based on a series of instructions. Computers can be divided into two parts: software systems and hardware systems. The first computer ENIAC was announced on February 14, 1946

Precautions

Computer equipment must be powered off correctly, otherwise it will affect its working life and be the culprit of some faults.

. The correct sequence for turning on and off a computer is: turn on the computer, first connect and turn on the peripheral devices (such as monitors, printers, etc.), and then turn on the computer host power; The shutdown sequence is exactly the opposite, turning off the host power first, and then disconnecting the power to other peripheral devices

2. Safety Instructions for Using Computer Equipment

(1) Computer equipment should not be placed in dusty areas (such as windows near the roadside). If it is not possible to change places, it should be covered with dust covers or other equipment when not in use; It is not suitable to place it in a damp place (such as near a water bottle or a water dispenser, as it is easy for people to splash water onto the equipment when pouring water), and it is also important to pay attention to the heat dissipation of the main unit box to avoid direct sunlight on the computer (2) It is strictly prohibited to use other electrical appliances, hand warmers, and other personal electrical equipment on the dedicated power socket of the computer. When leaving work, it is necessary to check whether all computer equipment is turned off before leaving (3) Do not move the computer while it is working (4) Do not plug or unplug devices while the computer is working. Frequently switch on and off the machine, and plug and unplug various interfaces (except for USB interfaces) with power, which can easily burn the interface card or cause damage to the integrated block (5) Anti static, anti dust, and prevent water from entering the keyboard, mouse, and other devices (6) Regularly backup data and organize disks. Due to the frequent use of hard drives, viruses, incorrect operations, etc., some data is easily lost. So it is necessary to regularly backup some important data to prevent all the work completed in a few months from being lost due to delayed backup. Regularly organize the disk and clean up junk files in a timely manner to avoid excessive disk space occupied by junk files. It also brings inconvenience to the search and management of normal files, making it not only easy to delete important files, but also difficult to find the necessary files in emergencies and other issues (7) If any problems are found, they should be reported for repair in a timely manner to ensure that the machine always operates in a good condition. This includes: whether there are any abnormalities in the equipment, whether the wiring is loose, etc (8) Prevent computer viruses, install antivirus software, regularly upgrade and check for viruses

Notes on computer usage:

1. Automatically link to some unfamiliar websites.

. When surfing the internet, be careful not to randomly click on things you don't understand, especially some pornographic images and advertisements floating on browser pages. Don't click on them; If it affects your browsing of the webpage, drag the slider up and down until you have the best viewing angle. Additionally, some internet plugins should be avoided as much as possible. Also, do not install the internet assistant and its toolbar, as such software can sometimes affect the normal use of the browser 2. Do not casually download and install some small software or programs on the internet 3. Do not casually send emails from strangers. Received emails from strangers, especially those with tempting titles such as a joke or a love letter with attachments