Difference B/w Virus , Worms ,Trojan & Spyware : VIRUSESs

Difference B/w Virus , Worms ,Trojan & Spyware

 All of us have heard already about VIRUS , WORMS , TROJANS and SPYWARES but only few ones know the difference b/w them. As usually we considerd every detected thing by antiviruses as VIRUS but its not a case. The antiviruses not only save us from viruses but also protects us from Trojans , Worms and Spywares. All can be dangerous for your computers . Today i'll tell about difference them

VIRUS
 A virus is a self replication program and software which is attached to an executeable 
 files. When file is opened or executed the virus automatically gets executed and enter into system memory .when enters it searches for other files that can be infected or stays in the background and infect the files that are uses the virus infected program.
Worms
Worms are very similar to viruses but differ in way that they don't bind themselves to executable files instead  to replicate themselves they uses the network.If you find excessive use of your network bandwidth then you may be infected by a worm.So,a worm donot require a user to execute any file for its execution it can work without user intervention.
Trojan Horse
A trojan horse is harmful program which may seem harmless to the user before its installation but instead it is programmed or reverse engineered to  facilitate unauthorised remote access to the computer.Trojan’s donot replicate themselves.
Spyware
A spyware is a program and software that secretly monitors and collects pieces of information.They usually run in stealth mode and cannot be detected easily.Keyloggers is a great example of spyware software.There are not limited to just spying but can also send data to remote computers.

Here is the list of names of most harmful virus and worms in the history of computers

•  Storm Worm
•  Leap-A/Oompa- A
•  Sasser and Netsky
•  MyDome (Novarg)
•  SQL Slammer / Sapphire
•  Nimda
•  Code Red and Code Red II
•  The Klez
•  ILOVEYOU
•  Melissa