A computer virus is a small software program that attaches itself to a program or file. It is designed to spread from one computer to another and interfere with computer operation. To avoid viruses, it's essential that you have security software(antivirus).
Types Of Viruses
Trojan Horse:
A trojan horse program has the appearance of having a useful and desired function. While it may advertise its activity after launching, this information is not apparent to the user beforehand. Secretly the program performs other, undesired functions. A Trojan Horse neither replicates nor copies itself, but causes damage or compromises the security of the computer. A Trojan Horse must be sent by someone or carried by another program and may arrive in the form of a joke program or software of some sort. The malicious functionality of a Trojan Horse may be anything undesirable for a computer user, including data destruction or compromising a system by providing a means for another computer to gain access, thus bypassing normal access controls.
Worms:
A worm is a program that makes and facilitates the distribution of copies of itself; for example, from one disk drive to another, or by copying itself using email or another transport mechanism. The worm may do damage and compromise the security of the computer. It may arrive via exploitation of a system vulnerability or by clicking on an infected e-mail.
Bootsector Virus:
A virus which attaches itself to the first part of the hard disk that is read by the computer upon bootup. These are normally spread by floppy disks.
Macro Virus:
Macro viruses are viruses that use another application's macro programming language to distribute themselves. They infect documents such as MS Word or MS Excel and are typically spread to other similar documents.
Memory Resident Viruses:
Memory Resident Viruses reside in a computers volitale memory (RAM). They are initiated from a virus which runs on the computer and they stay in memory after it's initiating program closes.
Rootkit Virus:
A rootkit virus is an undetectable virus which attempts to allow someone to gain control of a computer system. The term rootkit comes from the linux administrator root user. These viruses are usually installed by trojans and are normally disguised as operating system files.
Polymorphic Viruses:
A polymorphic virus not only replicates itself by creating multiple files of itself, but it also changes it's digital signature every time it replicates. This makes it difficult for less sophisticated antivirus software to detect.
Logic Bombs/Time Bombs:
These are viruses which are programmed to initiate at a specific date or when a specific event occurs. Some examples are a virus which deletes your photos on Halloween, or a virus which deletes a database table if a certain employee gets fired.
main types of Computer Viruses are, transient virus, resident viruus, stoned virus, time bomb, logic bomb, spoofing, trogen horce viruses, masquerading, deniel of service.
Some viruses can delete all of the data on your computer, while many just steal your identity and can steal your personal details. There are different types of viruses such as Malware, Trojans, Worms and more. It is highly recommended that you have good Antivirus software to protect you from these sort of viruses. There are some viruses that sneak into your computer by pretending to be a anti-virus and make you install it and give out your credit card details. Only give out details to companies you trust like Kaspersky.
Three computer viruses are ping-pong, acid and 1260. Ping-pong is considered as a harmless virus. It does not affect most computers in a negative way.
A fake virus is something that looks like a virus, but is a "contained virus" in a way because the user of the "infected" computer can just shutdown their computer, and it will be all good again. A good way to make these fake viruses are via command prompt (batch files), and java scripts.
there called Icon's - which represent software programs or hardware you can access on your computer
webcam
From Virus on Wikipedia, the free encyclopedia:A virus is a small infectious agent that can replicate only inside the living cells of organisms.Computer viruses also spread all over your computer in a different manner. They get in your files, just like a real-life virus can get in all of your blood cells.So can you see the relation of why they're called viruses?
All of them.
All of them.
all computer games risk you of having a viruses, but marapets has a lot of viruses!
All computer viruses that can run code on your computer have the potential to destroy everything or send your personal data to a hacker.
not at all
No. Computer viruses are only called "viruses" by figurative analogy with biological viruses. And biological viruses (such as chickenpox, hepatitis, and the flu) are not the same as disease-causing bacteria (such as strep throat, tuberculosis, and lyme disease).
Computer programs that do not have a positive outcome for your PC.
If you don't want viruses, download a good antivirus software such as Norton 360. Not all antviruses will remove all viruses, so occasionaly, a virus will pop up on your computer.
It all depends on which virus your computer gets. There are file deleting viruses and viruses which cause other problems.
no, it does not at all do not worry about it
There are hunderds of ways it will make your desktop differ. For example: - Computer Viruses could disable all programs you have. - Computer Viruses could turn off your Anti-Virus. - Computer Viruses could block Internet from you.