Difference Between Virus,Worms,Trojan and Spyware

Difference Between Virus,Worms,Trojan and Spyware:

We all have heard the terms Virus,Worms,trojans and spyware but only a few of us know the difference between them.We genreally consider everything that is detected by an antivirus as virus but this is not the case.The antivirus not only provides protection against viruses but it also protects us from trojans,worms and spywares.All these can be