Computer viruses are those malicious programs that once they infect your machine, they start causing havoc in your computer. What many people do not know is that there are many different types of infections that are classified into different category. In this article you will learn how to clean virus off computer.

The aim of this article is to focus on those malware that are considered Trojans, worms, and viruses. Though, this information can be used to remove other types of malware as well. We will be providing a broad overview of how to clean virus off computer. For the most part, these instructions should allow you to remove a good deal of infections but there are some that need special steps to be removed and these won’t be covered under this tutorial.

Before we continue it is important to understand the generic malware terms that you will be reading about.

Malware – Malware is a program or files that are developed for the purpose of causing harm. Thus, malware includes computer viruses, worms, Trojan horses, spyware, hijackers, and certain type of adware.

Ransomware – Ransomware are programs that encrypts the files on a computer and then demand a ransom in order to decrypt them. The ransom is typically in a digital currency called Bitcoins.

Adware – A program that generates pop-ups on your computer or displays advertisements. It is important to note that not all adware programs are necessarily considered malware. There are many legitimate programs that are for free but display ads in their programs in order to generate revenue. As long as this information is provided up front then they are generally not considered malware.

Tech Support Scams – Tech Support Scams are programs that pretend to be a security alert from Microsoft or another company. These fake alerts indicate that something is wrong with your computer and that they lock you out of it until you call a listed phone number. Once you call that number, the scammers will try to sell you unnecessary remote support services and software.

Backdoor – A program that allows a remote user to execute commands and tasks on your computer without your permission. These types of programs are typically used to launch attacks on other computers, distribute copyrighted software, media or hack other computers.

Dialer – A program that typically dials a premium rate number that has per minute charges over and above the typical call charge. These calls are with the intent of gaining access to pornographic material.

Hijackers – have you ever wondered why your browser directs you to another page when you tried to open a page? A program that attempts to hijack certain Internet functions like redirecting your start page to the hijacker’s own start page, redirecting search queries to an undesired search engine or replaces search results from popular search engines with their own information is called a Hijacker. And, it is harmful to your PC at times.

Spyware – A program that monitors your activity or information on your computer and sends that information to a remote computer without your knowledge.

Trojan – A program that has been designed to appear innocent but has been intentionally designed to cause some malicious activity. It also provides a backdoor to your system.

Virus – A program that when run, has the ability to replicate itself by infecting other programs and files on your computer. These programs can have many effects ranging from wiping your hard drive, displaying a joke in a small box, or doing nothing at all except to replicate itself. These types of infections are harmful to your computer and have the ability to spread to another computer on their own. The word virus has incorrectly become a general term that encompasses Trojans, worms, and viruses.

Worm – A program that when run, has the ability to spread to other computers on its own using either mass-mailing techniques to email addresses found on your computer or, by using the Internet to infect a remote computer using known security holes. You can be infected through browsing some websites.

How do these infections start?
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