What are the different types of virus and their effects on computer?

What are the different types of virus and their effects on computer?

The main types of computer virus are as follows: Boot Sector Virus. Direct Action Virus. Multipartite Virus.

What are 5 computer viruses?

A Guide to Computer Virus Names

• Morris Worm. Let us start our journey with Morris Worm or the “Great Worm”, which is believed to be the pioneer among computer worms distributed through the internet.
• Nimda.
• ILOVEYOU.
• SQL Slammer.
• Stuxnet.
• CryptoLocker.
• Conficker.
• Tinba.

What are the 5 worst computer viruses?

The Top 10 Worst Computer Viruses in History

• Klez – $19.8 billion.
• ILOVEYOU – $15 billion.
• WannaCry – $4 billion.
• Zeus – $3 billion.
• Code Red – $2.4 billion.
• Slammer – $1.2 billion.
• CryptoLocker – $665 million.
• Sasser – $500 million.

What is a common computer virus?

blue screen errorboot sector virusbrowser hijackercommon computer virusesCyberSecuritydirect actionfile infectormissing filesmultipartite virusnetwork virusoverwrite virusresident virusweb scripting virus.

Who named computer virus?

The term “computer virus” was coined in the early 1980s. Fred Cohen, then a Ph. D. student at the University of Southern California, came up with the idea of using self-replicating software, which spreads by attaching itself to existing programs as a way of attacking the security of multi-user computing systems.

What are the different types of computer viruses?

13 Different Types of Computer Viruses. 1. Boot Sector Virus. Boot Sector virus infects the storage device’s master boot record (MBR). Any media, whether it is bootable or not can trigger 2. Direct Action Virus. 3. Overwrite Virus. 4. Web Scripting Virus. 5. Directory Virus.

How do computer viruses affect your computer?

These viruses live in primary memory (RAM) and get activated whenever you switch on the computer. They affect all files currently running on the desktop. Basically, it allocates memory, blocks original scripts, and runs its own code when any program is executed. Can affect: Any file running on PC and files that are being copied or renamed.

What is the biggest computer virus in history?

The Top 10 Worst Computer Viruses in History. 1 1. Mydoom – $38 billion. The worst computer virus outbreak in history, Mydoom caused estimated damage of $38 billion in 2004, but its 2 2. Sobig – $30 billion. 3 3. Klez – $19.8 billion. 4 4. ILOVEYOU – $15 billion. 5 5. WannaCry – $4 billion.

How much do computer viruses cost each year?

Computer viruses cost an estimated $55 billion each year in cleanup and repair costs. The biggest computer virus ever is the Mydoom virus, which did an estimated $38 billion in damages in 2004. Other notables are the Sobig worm at $30 billion and the Klez worm at $19.8 billion.