Computer clean up

<p>Anti-virus software is a unique software program, which is used to prevent, detect and remove malicious programs, including but not limited to computer viruses, computer worm, Trojan Horses, Spyware and Adware.<br /> <p> <br /> <p>The primary method of preventing the propagation of malicious code involves the use of anti-virus software. Anti-virus software is an application that is installed on a system to protect it, and to scan for viruses as well as worms and Trojan horses. Most viruses have characteristics that are common to families of virus. Anti-virus software looks for these characteristics or fingerprints to identify and neutralize viruses before they impact you.<br /> <p> <br /> <p>There are many types of known viruses, and new ones are added all the time, so in this situation without anti-virus software your computer will be at great risk. There are different types of anti-virus software, some of them use basic technique to detect and remove viruses and malicious codes from your pc.<br /> <p> <br /> <p>On the other hand some anti-virus software uses its own unique features to protect your pc. Many known anti-virus software uses some very useful method, like Signature base detection and Heuristics base detection to detect viruses and malicious programs, and uses other methods and techniques according to their features. As new viruses added almost every day, anti-virus software companies also upgrade their anti-virus protection products, they launches their new version of antivirus software within very short period of time to provide users maximum protection from most recent threats.<br /> <p> <br /> <p>So if you are using any anti-virus software, it is recommended that you upgrade it and its virus definition regularly to be protected from viruses and malicious programs.