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In simple words, a security tool is a software that is installed on a computer or a network in order to protect it from malicious attacks. With recurrent use of the internet, security of a system is becoming an increasingly important concern as most of the viruses and spywares slip on to a computer via internet. Sometimes they make their way through browsers or sometimes as bundlers, and make the system vulnerable to harmful threats. Softwares like anti-spywares and firewalls prevent and remove computer viruses. Usually, such softwares include a "real-time" protection feature which endeavors to block incoming viruses before they infect a computer. Some of the softwares can also scan the computer for infections and even require regular updating to remain effective against new threats.
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