#6 ADWARE

Adware is software that can play, display, or download advertisements to a system. Adware operates either after the installation of a software into the system or while the application is being used. Sometimes users accept the adware in exchange for using software at no cost. All the adware are not harmful, but some adware are also spywares and hence a threat to security.

Prevention: 1) Make use of anti-spyware programs like Spybot - Search & Destroy; 2) Keep your anti-virus software or patches updated.

#7 BOTNET

Botnet is a group of software robots, or bots that run programmed task on the internet. The term botnet refers to a disturbed network of compromised computers, which is called as Zombie computers. These Zombies run programs like Trojan horses, backdoors and worms. Botnet are used to start Distributed Denial-of-Service (DDoS) attacks against websites.

Prevention: 1) Security measures such as FireEye, Simplicita, Damballa, Symantec, and Trend Micro can be used to prevent botnets; 2) Keep the anti-virus software updated.

#8 TROJAN HORSE

Users can get infected with Trojan horse by downloading applications which often pose as must have software to users. In other words the malicious websites try to lure the users into downloading an amusing application with malicious codes embedded into them. The Trojan horses can deliver payloads and hence have the potential to cause damage. They can delete or overwrite data on computer and cancan add user’s computer to a network of Zombie computers to start Distributed Denial-of-Service attacks or send spam. This can allow remote access to victim’s computer and can install other malicious programs also.

Prevention: Use anti-virus software to detect and remove Trojan horse automatically

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