Do you currently have a virus infected computer system? Truth be told, you probably would not even know as these infections can sometimes be quite inconspicuous and often difficult to spot. However, you should notice some obvious symptoms like concurrent errors, reduced performance, possible system crashes or reboots and even stop error screens which indicate device or startup software failure which can very easily be the work of a virus infection. So most people will go to the internet and download a free virus removal security program which is the correct course of action in that you can restore your computers health and destroy any infections of a harmful nature within seconds. This is really only partly true as even some of the most advanced and sophisticated free virus removal programs today are not able to detect certain infections because of their complexities and special coding. The internet is almost like a breeding haven for viruses, spyware, malware, worms and other malicious software including the infamous trojan horse. They all are made to do more or less the same thing but some are certainly more dangerous than others. There are millions of people who browse the web on a daily basis and many of them are totally unaware of the risks they are exposed to when they surf and download content. The most alarming fact is that there are actually infection removal tools out there which are fake and will infect many files on your computer during their scanning operations instead of fixing the problem at hand. Viruses once triggered into memory will attack any executable files they can which commonly have the extensions EXE, BAT or COM so other files that are pure data like audio files and pictures are safe. To explain the whole process briefly ever time you run a program which has been infected with virus coding it will load up and affect other programs whether they are on a single computer or on a large network.

This is why they are so dangerous in that they can spread very quickly and if you transfer infected files between pc systems via floppy disk or CD Rom then you can cause further problems. Viruses act like worms which self replicate and specifically target computers with vulnerable security within a network and seek to cause havoc as much as they can as they attempt to delete system contents and manipulate settings. Some people will tell you that spyware is in fact less of a concern that  viruses but this is totally untrue as they both exploit your security by accessing your computers information and even though only viruses cause hard drive damage spyware is equal in what it does. Overwrite viruses are one particular type that are very malicious in that they are ones that overwrite or delete the information contained within the files they infect basically leaving them useless to the user. You see, whenever a virus will infect a file it will replace its contents so it won't necessarily change the size of the file unless it needs to occupy more space. Another form is the encrypted virus which allows them to remain undetectable by popular free virus removal tools in which they will decrypt themselves just before they execute a task and will then revert back to their secret nature on completed. If you suffer from a file allocation table ( FAT ) virus you will suffer as they prevent your operating system from gaining access to sectors of your hard disk where critical information may be stored for running applications and tasks. Watch out for hoaxes as there always many of these roaming around the internet today which are characterized by messages or emails that warn people of false infection types and encourage you to go to a website and download a program that will help you  protect your pc against it.

So there really are many types of these malicious applications around and one needs to understand that although each one has slightly different roles they all work towards the same common objective which is to harm your computer. Of course it is possible to uninstall a program which might be infectious but you must also manually remove its location folders and other left over files otherwise the problems will still be around. It is this process of locating the individual left over files which is the hardest part when you do it yourself in which you should then revert to proper security tools that will do the hard work for you. If you look at it in the long run it really is worth spending about 25 dollars on a free virus removal tool which will last a lifetime and ensure that all contents of your hard disk are safe guarded and won't fall victim to infections. So whether you are a serious internet surfer or not it is essential that these tools are used on a daily basis so if you don't then you can expect the worst to happen. For those people who have the windows XP operating system you should install and upgrade to service pack 2 which contains a firewall security update that will protect your computer against spyware while you surf through the internet.

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