Common knowledge on prevention of viruses

1. What is the knowledge to prevent viral infections

Viral infections are infectious diseases caused by viral infections.

Viral infections are mostly transmitted through the respiratory tract, digestive tract, skin, placenta, reproductive tract and other channels, resulting in human infection, there will be fever, headache, general malaise and other symptoms of toxicity, but also localized symptoms in the corresponding parts. To prevent viral infections, it is crucial to isolate the source of infection and cut off the transmission path.

In addition, active immunoprophylaxis is also a key measure. If the patient is suffering from respiratory viral infection, it is necessary to isolate this part of the patient to avoid infecting others.

At the same time, avoid gathering in crowded and densely populated places to avoid being infected. If the infection is caused by gastrointestinal viruses, it is necessary to do a good job of isolating patients with intestinal viruses, and at the same time do a good job of cleaning and disinfecting dishes and sanitizing feces.

If the patient is caused by liver virus infection, such as hepatitis A and hepatitis E fecal-oral transmission of infectious diseases, to isolate the patient, do a good job of disinfection; if it is caused by hepatitis B, hepatitis C, hepatitis D disease, mostly by blood transmission or mother-to-child transmission, sexual transmission, the key to do a good job of prevention, the key is to avoid transfusion of blood, to avoid drug use, as well as to avoid sexual contact caused by the spread of the disease. If the infectious diseases caused by skin mucous membrane viruses, such as measles, rubella, chickenpox, shingles, etc., should also do a good job of prevention, you can vaccinate against measles, rubella vaccine, etc., you can be vaccinated against hepatitis B vaccine, measles vaccine.

2. What are some tips to prevent viruses

Prevention First Stay informed. Did you know that viruses and security warnings appear almost every day? Get the latest virus outbreaks by bookmarking our Security & Repair homepage.

2. Get Protected If you don't have virus protection software installed on your machine, you'd be wise to install one.

If you're a home or personal user, it's fairly easy to download any of the best-ranked programs and follow the installation wizard. If you're on a network, consult your network administrator first.

3. Scan your system regularly If you happen to be launching antivirus software for the first time, it's a good idea to have it scan your entire system.

It's good to start your computer clean and virus-free. Often, antivirus programs can be set up to scan your system every time your computer starts up or run on a regular schedule.

Some programs can also scan the system in the background while you are connected to the Internet. Regularly scanning your system for viruses should ideally become a habit.

4. Update your anti-virus software Now that you have virus protection installed, you should make sure it is up to date.

Some antivirus programs come with the ability to automatically connect to the Internet and add new virus-detection code whenever the software vendor discovers a new threat. You can also scan your system for the latest security update files here.

5. Don't execute attachments such as EXEs and other executable programs. These attachments are very likely to contain computer viruses or hacker programs, and running them easily can lead to unpredictable results.

For friends and strangers, you must check the executable program attachments in the e-mails and make sure that there is nothing wrong with them before using them.

Don't open the attached files easily The other party sends over the electronic mail and related attachments to the document, first of all, use the "Save As..." command ("Save As...") to save to the local hard disk. Save As..." command ("Save As...") to the local hard disk, to be used to check the computer virus software to check the non-toxic before you can open and use. If you use the mouse to click directly on the DOC, XLS and other attached documents, will automatically enable Word or Excel, such as attachments in the computer virus will be immediately infected; such as "whether or not to enable the macro" prompt, it is absolutely not easy to open, otherwise it is very likely to be infected with electronic mail computer viruses.

7. Do not directly run the attachment For the file extension is very strange attachment, or with script files such as *.

VBS, *. SHS, etc., do not directly open the attachment, you can generally delete the e-mails containing these attachments to ensure that the computer system is not computer viruses.

8. Email Settings If you are using Outlook as your email program, you should make some necessary settings.

Choose the "Options" command in the "Tools" menu, and set "Attachment security" to "High" in "Security". "High" in "Security"; in "Other", press the "Advanced Options" button, press the "Add-in Manager" button, uncheck the "Add-in Manager" button, and press the "Add-in Manager" button. Press the "Add-in Manager" button, and uncheck "Server Script Run". Finally, press the "OK" button to save the settings.

9. Be careful with the preview function If you are using Outlook Express as a software to send and receive e-mails, you should also make some necessary settings.

Choose the "Tools" menu in the "Options" command, in the "Read" in the unchecked "in the preview pane to automatically display news mail" and "automatically display the picture attachments in the news mail". This prevents some electronic mail computer viruses from using the default settings of Outlook Express to run automatically and destroy the system.

3. Knowledge of infectious disease prevention and control

I. General principles of infectious disease prevention and control

The key to effectively curbing the prevalence of infectious diseases lies in cutting off the chain of transmission of infectious diseases: that is, controlling the source of infection, cutting off the means of transmission, and protecting susceptible populations. To this end, we must do:

1, develop good habits of hygiene, pay attention to personal hygiene, food hygiene, environmental hygiene.

2, strengthen physical exercise, improve immunity.

3, according to the provisions of the vaccine.

4, on the infectious disease should be early detection, early reporting, early treatment, early isolation, to prevent cross-infection.

Second, the high incidence of infectious diseases in various seasons

Spring

The prevalent infectious diseases mainly include: epidemic cerebrospinal meningitis (referred to as meningoencephalitis), measles, chicken pox, mumps, scarlet fever, rubella, influenza and other respiratory infectious diseases; viral hepatitis A; hand, foot, and mouth syndrome caused by contact transmission.

Prevention and treatment methods: room ventilation, vinegar disinfection, quilt drying, vaccine injection, spring excursions, do not go to the dense place.

Summer

is the high incidence of intestinal infectious diseases, including: bacterial food poisoning, bacillary dysentery, amoebic dysentery, viral enteritis, typhoid fever, viral hepatitis, and so on.

Prevention and treatment methods: food procurement strict control, disinfection of tableware double insurance, personal hygiene should pay attention to, raw vegetables and cold mixed with more than one meal, fruits and vegetables before eating first peeled, large banquets to reduce, indoor cleaning mosquitoes and flies, to ensure that the nutritional foot sleep.

Autumn

The fall season is located between summer and winter, so infectious diseases from summer and winter seasons can occur in the fall. In addition, polio often occurs in the fall.

Winter

Influenced by factors such as climate and population movement (spring transportation), it is susceptible to large localized outbreaks of respiratory infectious diseases. Common respiratory infectious diseases in winter include: common cold, influenza, measles, chickenpox, rubella, mumps, meningitis, etc., which are mainly transmitted through air droplets.

Prevention and treatment methods: vaccination on time, pay attention to the increase or decrease of clothing, strengthen physical exercise.

4. Virus defense knowledge

Put down the title, is the answer.

I hope your machine will soon be back to normal, antivirus software are installed full poisoning but also to find a special kill poisoning is still why because the concept did not change do not want to poison sweating learning knowledge uninterrupted defense virus to invade the never poisoned gold is not a fundamental solution, do not believe that the poisoning is still poisoned! If you read the Antivirus Classic, you will be able to stay away from the problems of theft, hacking, system damage, advertisements, and Trojan horse viruses. The only thing you need to do is to practice a little bit more and you will be able to walk across the Internet.

In the face of the Trojan horse, a slight smile, absolutely not smoking. The people who have read the "Anti-Virus Classic" have all said yes! The first thing you need to do is to find out if the virus has been killed or not, or if the antivirus software has been turned off. The anti-virus software has been shut down? Are you worried about antivirus every day? Are you worried about antivirus every day? Are you angry with the pirates? Are you angry with the pirates? Hate viruses? You are not feeling antivirus software ranked high, but the actual use of the real general it.

This is because of the weak ability to stop the virus loading, so there is a repeated check! The first thing you need to do is to get rid of all the bugs in your computer, so that you can get the best out of them. However, the antivirus ranking does not take into account the ability to stop the virus loading this factor, will not be ranked as a standard, so the ranking is just scanning static virus test.

"Antivirus ranking is to give people a user's soul soup" Antivirus market bubble, by improving the ranking to expand their market, but companies do not eat this set. None of the top rankings have a huge impact at the enterprise level Antivirus rankings don't take into account the ability to stop viruses from loading as a factor, not as a ranking criterion, so the rankings are just scanning for static virus tests.

They're all still going the traditional way, but like McAfee Enterprise, which has had Generic Buffer Overflow Protection for a long time, none of the antivirus tests are measuring that.

If everyone could avoid getting poisoned with just a few words, there would be no virus pandemic, and no point in having one. Quickly become a security expert 3-step first step to learn the principles of the second part of the antivirus software to find the third step McAfee rules to kill anti-virus first step to learn the principles of Windows Security Principles and Techniques [AVI] the second part of the antivirus software to find the enterprise version of the antivirus is highly recommended, McAfee Enterprise Edition or Symantec Enterprise Edition, the enterprise-level technology to make you more secure.

『The most varied and complete (16 brands) 』 or with an auxiliary Super Patrol If you install the McAfee enterprise version of the anti-virus software can be easily dealt with can not be deleted, kill the virus can not be out of the end of the virus, free of virus terminator 『Registry access to the protection of the rules 』 (the use of McAfee customized rules to protect the security model is not tampered with by the virus example) Rule name: Write your own Processes to be included: * Processes to be excluded: Leave blank Fill in according to your own reality.

Possible paths Registry entries or registry values to protect: Select HKLM Fill in /SYSTEM/ControlSet*/Control/SafeBoot/** Rule type: Entry Actions to block: Check "Write to entries or values" and "Create entries or values". "Create item or value" and "Delete item or value".

5. Preventing infectious diseases

Preventive measures for infectious diseases The purpose of preventing infectious diseases is to control and eliminate them to protect people's health, ensure social stability, and promote the modernization of the country.

In view of the three basic aspects of the epidemic of infectious diseases, based on comprehensive epidemic prevention measures, and conscientiously implement the policy of prevention. The main preventive measures are as follows: (a) management of infectious agents 1. management of patients and carriers of pathogens Requirements for early detection, early diagnosis, early isolation, and active treatment of patients.

In 1978, the State Council announced the "Regulations on the Management of Acute Infectious Diseases", and on February 21, 1989, the Standing Committee of the National People's Congress formally adopted the "People's Republic of China *** and the State Law on Prevention and Control of Infectious Diseases", which came into force on September 1 of the same year. Prevention and control law provides for the management of infectious diseases are divided into A, B, C three categories.

Infectious diseases reported to the health epidemic prevention agencies are called statutory infectious diseases. Category A: plague, cholera.

Category B: viral hepatitis, bacterial and amoebic dysentery, typhoid fever and paratyphoid fever, AIDS, gonorrhea, syphilis, poliomyelitis, measles, whooping cough, diphtheria, epidemiological cerebrospinal meningitis, scarlet fever, epidemiological hemorrhagic fever, rabies, leptospirosis, brucellosis, anthrax, epidemics and endemic typhoid fever, epidemic encephalitis, black fever, malaria, dengue fever. Category C: Tuberculosis, Schistosomiasis, Filariasis, Borreliosis, Leprosy, Influenza, Mumps, Rubella, Neonatal Tetanus, Acute Hemorrhagic Conjunctivitis, Infectious Diarrhea other than Cholera, Dysentery, Typhoid Fever and Paratyphoid Fever.

The Army also stipulated in 1979 that bacterial food poisoning and acute enteritis should be reported in the monthly epidemic report. Infectious disease outbreak reports strive to be rapid.

Category A infectious diseases, the requirements of the city shall be reported to the health epidemic prevention agencies within six hours, the rural areas shall not exceed 12 hours; Category B infectious diseases require the city shall be within 12 hours; the rural areas shall not exceed 24 hours. Health care personnel, health care personnel, the epidemic shall not conceal, misreport, or authorize others to conceal and misreport the epidemic.

The management of pathogen carriers and the necessary treatment. Especially for food production, supply and marketing personnel, cooks, nursery workers to make a regular bacterial inspection, timely detection, timely treatment and transfer of work.

For infectious disease contacts, medical observation, observation, collective quarantine, immunization or drug prevention when necessary. 2. The management and treatment of infected animals The source of infection of animals, wild animals and domestic animals of economic value, should be isolated for treatment, if necessary, slaughter, and disinfection, no economic value of wild animals to mobilize the masses to be killed.

(B) cut off the transmission path According to the different transmission paths of infectious diseases, take different epidemic prevention measures. Intestinal infectious diseases for bedside isolation, disinfection of vomit and diarrhea, strengthening dietary hygiene and personal hygiene, good water and feces management.

Respiratory infectious diseases, should make indoor ventilation, air flow, air disinfection, personal masks. Insect-borne infectious diseases, there should be anti-insect equipment, and the use of drugs to kill, prevent and expel insects.

(C) protection of susceptible populations Improve the resistance of the population, focused and planned vaccination to improve population-specific immunity. Artificial automatic immunization is a planned vaccine, bacteriophage, toxoid vaccination of susceptible people, vaccination immunity appeared in 1 - 4 weeks, lasting several months to several years.

Artificial passive immunization is an emergency need, injection of antivenom, gammaglobulin, placenta globulin, high-efficiency immunoglobulin. Immunity appears rapidly after injection and loses its effect after 1~2 months.

6. How to prevent infectious diseases knowledge

The state of infectious diseases to implement the policy of prevention, prevention and treatment, classification and management, relying on science, relying on the masses. All levels *** should organize and carry out mass health activities, health education to prevent infectious diseases, advocate a civilized and healthy lifestyle, improve public awareness of the prevention and treatment of infectious diseases and the ability to cope with them, and strengthen the construction of environmental sanitation to eliminate rodent infestation and mosquitoes, flies and other vectorial organisms; the planned construction and the making of public *** sanitation facilities, improve the sanitary conditions of drinking water, sewage, filth, feces, harmless disposal; the State has a plan to build and the making of public health facilities, improve drinking water sanitation conditions, sewage, dirt, and feces. Harmless disposal of sewage, dirt, feces; the state to implement a planned system of vaccination; patients with infectious diseases, carriers of pathogens and suspected infectious diseases patients in isolation management, etc.. Specific measures are:

(1) Management and control

An infectious agent is a person or animal that has a pathogen parasitically reproducing in its body and is capable of discharging the pathogen. The elimination or rendering harmless of infectious agents is called management of infectious agents.

Early detection, early reporting, early isolation and early treatment of infectious diseases.

Many infectious diseases, such as dysentery, influenza, whooping cough, etc. in the early onset of the most contagious, early discovery of infectious diseases, can prevent the spread of infectious diseases in a timely manner. Early reporting is an important means of preventing and controlling the prevalence of infectious diseases, found suspected infectious disease patients or diagnosed infectious disease patients, should be quickly reported to the local health center or epidemic prevention station. Early isolation can prevent the pathogen from spreading outward, so that the patient does not go out and others do not string together. Early and reasonable treatment is conducive to early cure and reduce the death rate.

The management of carriers and contacts with infectious disease patients should also be strengthened, and they should be observed and regularly checked under the guidance of epidemic prevention personnel.

Many animal infectious diseases can also be transmitted to humans. Therefore, the economic value of sick animals, such as livestock suffering from brucellosis can be given isolation treatment. No economic value or harm to the sick animals, such as dogs suffering from rabies, animals suffering from anthrax, should be killed, burned. People and poultry, livestock separation, is also an important measure to prevent *** **** disease.

(2) cut off the transmission pathway

Infectious diseases from the patient or pathogen carriers and then infected to healthy people, the middle needs a specific transmission pathway. The common ways of transmission are respiratory transmission, intestinal transmission, contact transmission, insect vector transmission. Some infectious diseases, such as hepatitis B, can also be transmitted through blood transfusion, ***, childbirth, etc., and can also be transmitted from mother to fetus through the placenta. Should take appropriate measures to cut off the transmission path.

(3) protection of susceptible populations

Preventive vaccination: that is, injecting or taking vaccine, vaccine, so that people get the resistance to the corresponding diseases, to prevent the occurrence and prevalence of infectious diseases. For example, after the human body injected measles vaccine, it can produce immunity to measles and avoid the occurrence of measles.

Drug prevention: some infectious diseases, there is no effective vaccine to prevent, but some drugs can play a certain role in prevention. Such as malaria, can be oral ethylaminopyrimidine prevention. For people who have been exposed to patients with epidemic cerebrospinal meningitis, oral compound sulfamethoxazole or sulfadiazine can be prevented.

7. Knowledge of anti-virus

Introduction to common viruses: bootstrap - bootstrap viruses are a class of viruses that infect the boot area of the disk or the main boot area, and they are the second most common viruses after the "macro viruses" in terms of infection rate.

As this type of virus infects the boot area, when the disk or hard disk in operation, triggering the infection of other *.exe, *, *.386 and other computer running the necessary command programs, resulting in a variety of damage. Common varieties of tpvo/3783, Windows system infection will seriously affect the speed of operation, some functions can not be performed, after the antivirus after the Windows operating system must be reinstalled in order to operate normally.

File-based - File-based viruses are a class of viruses that infect files, and are currently the most diverse class of viruses. The hacker virus Trojan.BO belongs to this type.

BO hacker virus is the use of communication software, through the network to illegally enter the computer system of others, access or tamper with data or background control of the computer. This causes various leakage and theft accidents.

Hybrid - This type of virus infects both the command file and the disk boot area and the master boot area. The CIH Destroyer virus, which destroys the motherboard chips (BIOS), belongs to this category.

CIH is a virus written by a Taiwanese university student who placed it on a university BBS site, and was introduced to the mainland in 1998, with attacks occurring on the 26th of each month. The virus was the first to directly attack computer hardware, and was extremely destructive, destroying the system programs in the computer's Flash BIOS chip when it struck, resulting in damage to the motherboard and hard disk data.

On April 26, 1999, the CIH virus struck on a large scale in China, Russia, and South Korea, paralyzing hundreds of thousands of computers and destroying a large amount of hard drive data on the mainland alone. Macro viruses - are a class of viruses that primarily infect data files such as WORD documents and document templates.

Macro viruses are viruses that use the macro programming language that comes with an application program. Currently, three types of macro viruses have been found internationally: WORD macro viruses that infect the WORD system, EXCEL macro viruses that infect the EXCEL system, and macro viruses that infect Lotus Ami Pro. At present, people say that the macro virus mainly refers to Word and Excel macro virus.

From the second half of '96 began to be widely popular in our country. Such as Tw No-A, Beautiful Kill, PaPa and so on.

Different from previous viruses, macro viruses have the following characteristics: ① infected data files: macro viruses specializing in infecting data files, completely changed the people's "data files will not spread the virus" of the wrong understanding. ② multi-platform cross-infection: macro viruses broke through the previous virus spread on a single platform limitations, when WORD, EXCEL and such software in different platforms (such as WINDOWS, WINDOWS NT, OS / 2 and MACINTOSH, etc.) run on the macro viruses will be cross-infected.

③ easy to write: previous viruses are in the form of binary computer machine code, while macro viruses are in the form of source code that people can easily read, so writing and modifying macro viruses is easier than previous viruses. From the end of 96 to now just half a year macro virus types have increased dramatically from more than thirty kinds to more than 1000 kinds.

④Easy to spread: someone else sends an article or sends an E-mail to you, and if they come with a virus, as long as you open these files, your computer will be infected by a macro virus. After that, you can open or create new files with macro viruses, which leads to a very high infection rate of macro viruses.

General prevention methods The use of computers in the unit is strongly opposed to the installation of pirated games, pirated game disks are the main carriers of computer viruses. Some of the game disks used for teaching purposes must also be checked by the department's professionals and killed before they can be installed and used.

The floppy disk must be checked and killed before the file can be copied to the hard disk. Email attachments in the *.exe file, do not run, directly delete the letter.

The first thing you need to do is to get a genuine antivirus program and use the DOS version of the program to check for viruses in the boot area of the hard disk. You should always download the upgrade file of the genuine antivirus software from the network and update your antivirus software in time, usually at least one to two times a month.

Install real-time monitoring antivirus software to dynamically monitor floppy disks, hard disks, networks, and Email for possible viruses. This prevention method requires more hardware, such as memory, hard disk to be larger, ...... install virus vaccines, such as the installation of the CIH virus vaccine.

Purchase computer motherboards that can prevent some virus hazards, such as dual BIOS motherboards, anti-virus infection motherboards for the main boot area, and so on. The hard drive should be partitioned as much as possible, and the main area (C drive) should be partitioned into 2G size, and the usual working data should be stored in the extended partition of the hard drive (e.g. D drive).

Even if the CIH virus strikes, existing technology can still recover the hard disk data. The extent of the recovery depends on the specific situation.

An introduction to commonly used antivirus software Norton AntiVirus: developed by Symantec's anti-virus software, one of its features is to provide real-time monitoring of computer operations - as long as the computer is turned on, Norton AntiVirus is running in the background, the virus whether it is through the Inter downloads, running a CD-ROM disc, Whether the virus is downloaded through the Inter, running a CD-ROM disk, Email attachment or invading the LAN, it can find the virus and eliminate it in time. Another feature is Symantec's weekly update of the virus signature library. Users can set up Norton AntiVirus' LiveUpdate to automatically dial up and connect, and automatically update the virus signature library, which is particularly complete in terms of code.

In addition, it takes up relatively few of your computer's system resources when running compared to similar software. Common antivirus software on the market:.