What's the best of antivirus? What the difference between adware , spyware , malware and virus?

What's the best of antivirus? What the difference between adware , spyware , malware and virus??

What's the best of antivirus? What the difference between adware , spyware , malware and virus??computer

Definition source Wikipedia http://www.wikipedia.org/

Adware is software with Ad functions bundled in a program

Spyware is computer software that is installed surreptitiously on a personal computer to intercept or take partial control over the user's interaction with the computer, without the user's informed consent.

Malware is Malicious software installed on your computer

A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. However, the term "virus" is commonly used, albeit erroneously, to refer to many different types of malware programs.

Two of the best rated (in detection / removal) Antivirus prorams you can buy is

Kapersky 49.99 http://www.download.com/Kaspersky-Anti-V...

and Nod32. 39.99 (nod32 will NOT slow down your computer)

http://www.download.com/Eset-NOD32-Antiv...

The Top Rated Free Antivirus Program researched from those who test Antivirus programs (av comparatives, virus.gr, and other reviews including this video review) http://www.youtube.com/watch?v=KhXZo3dHu... is