Free Antivirus Downloads and Types of Computer Viruses. Is There Any Connection?

Among the antivirus programs there are free antivirus software downloads which can provide the basic tools needed to protect your PC from different types of viruses as well as paid antivirus programs. To understand the antivirus programs, including free antivirus downloads, working and to make the right choice you should know the information about viruses and their types. Have learnt the information about different types of viruses, you’ll get an idea of viruses spotting and their removing from the system in the shortest time without anyone’s help using free antivirus downloads. Thus, there are programs created by hackers or crackers on purpose of weakening the computer protection and making it infected. Such programs are denoted as Computer Viruses. As a rule, viruses occupy huge disk space and thus there system crashes might happen.
Free Antivirus Downloads let you be aware of any virus penetration. Viruses will act without any slight sign of danger. Usually the user won’t know about viruses “progressive working” and become aware only when all the ways of viruses removing from the system are blocked by viruses.

It goes without saying that there are different types of computer viruses. Every type of computer viruses is employed to do its special task. The list of the most common types of computer viruses is given below.

Types of Computer Viruses	Description
Macro Viruses	These viruses are the most commonly seen as they infect documents such as MS Word or MS Excel and are typically spread to other similar documents. Being platform independent, they are seen in applications. They will make the malfunctioning application and provoke fail results out of it. This type of viruses is ported directly into the desired applications for which it has been written. If you think them harmless, you are mistaken as they are harming the whole performance of your computer. The applications serve as a host giving them a possibility to perform their action from there. When they occupy in a particular application, they will start their “black” work affecting the system in no time. As they are not in the hard disk only, you cannot rid of them by deleting the infected files. It would be too easy for macro viruses. First, the infected application should be found. For this purpose each and every application program should be open and differences in their performances should be noted down.  In case you find something wrong, check the application for infection and then re-install it.
Network Viruses	This type is spread through local area networks and internet. Once appear such viruses begin to infect other infected computers in the network spreading its copies from one to another computer. This goes on as a cycle affecting all the computers in the network. Among the existing viruses Nimba is the most dangerous one. A good anti-virus program or free antivirus downloads can serve as a protection from this type of viruses. But the program should be updated now and then through the internet if you want to solve the problem.
Logic Bombs / Time Bombs	Logic Bombs are lines of code that reside into software systems in our computer. These viruses are aimed to initiate at a specific date or when a specific event happens. A virus deleting your photos on Halloween or a virus deleting a database table if a certain employee gets fired can be as an example.
Companion Viruses	Companion Viruses are the rarest seen computer viruses. They are not very harmful for today’s systems. Usually they work in the MS-DOS area. When the file we want to open is an executable one, we, as a rule, do not enter the extension. In this case the companion viruses get opened and begin their functioning. This type is seen in both .com and .exe extensions.
Sector Viruses	Sector viruses are other rarest viruses in boot sector virus spreading through floppy disks. Recently these viruses are not found for some reasons.
Trojan Horse	While this virus may advertise its work after launching, the user is not aware in this information as a Trojan performs a useful and desired function beforehand. Then it becomes secretly undesired. The virus damages the PC security provoking data destruction without any replication or coping itself. It can be transferred with another program.
Rootkit Virus	This type of viruses is aimed at allowance to gain control of a computer system. These viruses are usually installed by trojans and are normally disguised as operating system files.

Uses of free antivirus downloads can help you to prevent computer damage.

On free antivirus downloads you can find the basic tools needed to protect your PC.