What is a computer virus, type, symptoms and ways to help protect against.

Computer Virus

What is a computer virus.

A computer virus is a computer program developed. To propagate. How to identify the virus program or not. The view of the program can be spread through the company (the host). Often, people between the worms and viruses are unclear. The worms, which are characteristic of the distribution, without relying on Saha. The virus can spread so that if the only carrier with lead and most viruses occur. destroy the evil system, if all orders. Memory devices like hard disk. And a program that can spread from one computer. Computer to another via computer communication systems, data networks such as the registration of the blade (disco).

The virus can be embedded in the file and your computer is infected, if the file is executed. Coll Because the virus is to rely on a computer network such as the World Wide Web, email and file system to share information with the distribution. Many viruses and worms can not free Coll. The virus can be carried by files that can run the software. Or the operating system. The boot sector virus can go from the leaf disk. types of index files. Document containing the macro index. Addition to the code of the virus used in the original data and the company. The virus can also change the original media. And you can make changes in the virus code is called when the company is operating.

Symptoms of the machine can predict that contagious or virus attack
1. To make your computer run slower than usual.
2. The computer stops unknown.
3. Data missing for unknown reasons.
4. Sends sound strange news.
5. The world, or stop working hard, without knowing why.
6. The files on the hard disk or have been modified to eliminate.

 
The type of computer virus. (Divided into contact). 
1. Boot sector viruses are copied to the disk and the boot sector of hard disk (boot sector is where the instructions in memory that requires opening the computer) to start or restart the computer virus working contact area, the disc , but only to the board is not the link file part-time program is produced or boot sector viruses are not popular today than ever before. Now, because of the burden of most computers from the hard drive is mainly

2. virus program, executable files, log files to include this within. COM o. EXE for others, the program can also be connected to end with. COM o. EXE, for this race to an end. Complete document inside. System. DLL. BIN etc

3. macro viruses, including the master file (model) is a document (or spreadsheet), after the master to create the infected document and all documents that are opened with a prototype of the damage. How to prevent computer virus bases. Despite the thousands of viruses. But most viruses in the computer lab. Viruses are only about 500 species are still common.



Most viruses are rarely dangerous to the computer and data could cause your computer to reduce competition for computer memory, etc. However, there are six simple ways to help protect your computer against viruses and data. 

1. The program detects and removes viruses (antivirus), but not the virus detection software. Any comprehensive program. The false virus, the same defect that caused the virus. Remember to update your virus program to identify and remove a regular basis, new types of virus.
2. Scan all files on diskettes and CD-ROM before the hard disk.

3. Scan the entire file to download from the Internet.
4. Analyze a file or program attached to e-mail before reading or saved to disk.
5. The documentation in ASCII text documents or sophisticated text format (RTF), including a network to share both the format does not record a macro in the document by which the safety of macro viruses.
6. Support for data and programs on your computer. Regularly. More importantly, continue to support your hard disk is not in the same set of data in real applications.