A computer virus is a program that affects the normal working of a computer system. It does not harm the computer’s hardware. Anti-virus software is used to protect pc from viruses. In this topic, you will be able to know about computer viruses & their important types.
Computer Viruses
A computer virus is a program that will disturb the traditional operating of an automatic data processing system. The virus attaches itself to files held on floppy disks, email attachments, and laborious disks. A file containing a virus is termed an infected file.
If this file is copied to a pc, the virus is additionally copied to the PC. A computer virus cannot effects hardware. it’s going to cause several damages to an automatic data processing system. A virus can:
- A computer virus will injure knowledge or software system on the pc.
- It will delete some or all files on the pc system.
- The virus will also destroy all knowledge by format Winchester drive.
- It could show a political or false message every few times.
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Types of Computer Virus
Following are some necessary types of a computer virus:
File Infector
A file infector is the foremost common style of a virus. It attaches to program files and unfolds to different programs on the Winchester drive.
Boot Sector Virus
The boot sector virus attaches itself to the boot sector of a hard drive. They execute each time the computer is started. They may destroy all data on the computer system.
Macro Viruses
Macro viruses infect the automatic command capabilities of productivity software. They attach themselves to the data files in word processing, spreadsheet, and database programs. They spread when the data files are exchanged between users.
More Types Of Computer Virus
Some more rogue programs are the following:
Time Bombs
Time bombs are also called logic bombs. It is one of the important types of computer virus. They perform an activity on a particular date. They are harmless until a certain event or circumstance activates the program. Michelangelo is a popular time bomb. It destroys data on the hard disk on March 6.
Worms
It is similar to a virus. The worm spreads from one computer to another. It controls the infected computers and attacks other networked computers.
Trojan horse disguises itself as a useful program. It contains hidden instructions and may erase data or cause other damage. It does not create copies of itself.
A different type of computer virus is spread on different computers due to the following reasons:
A virus can spread if the user opens and downloads an email containing a virus. Most of the viruses are spread through email messages.