Computer Virus : Computer virus can be defined as a malware programme which when executed, replicates itself by inserting copies of itself into other computer programs , data files or boot sector of hard drive. When this replication succeeds, it infects programs and files, alter the way the computer is working or stops it completely.
Computer viruses are programmed to harm computers by damaging programs, deleting files or reformatting hard drive. Others replicate and flood a network with traffic, making it impossible to perform internet activity. Even less harmful computer viruses can also interrupt system’s performances and speed, sapping computer memory and frequent computer crashes.
The tell-tale symptoms of virus infection are slow computer performance, erratic computer behaviour, unexplained data loss, etc.
Viruses enter our computers through different means. They could transfer from sharing files and folders, visiting on an infected site, opening spam messages or other e-mail attachments, downloading free stuff and other free utility services, installing mainstream software application without fully reading license agreement, etc. Email viruses travels as an attachment to e-mail messages, usually replicates itself by automatically mailing itself to dozens of people in victim’s e-mail address book.
Virus writers use social engineering and more details to know of security vulnerabilities to gain access to host’s computer resources. Motives could me making profit, desire to send some message publicly, personal amusement, experiment one’s programming skills, etc.
Read Also : Advantages and Disadvantages Of Computers
Computer viruses cause a great deal of economic damages every year by causing system failures, wasting computer resources, etc. In response many antivirus softwares have been developed and new viruses are discovered everyday. Antivirus protection, firewall, antispy software,etc should be installed on the computer. Operating systems must be kept up to date, browser security settings must be increased, avoid questionable websites, only download softwares from trusted sources, not opening spam emails etc might help a lot to avoid computer viruses. Firewalls monitor and hide the PC from online scammers.
Webroot internet security essentials and webroot antivirus spy sweeper provides full security from two most important threats on internet- spyware and computer viruses.
Thus for avoiding much expenditures in repairing a damaged system we should spend a little for installing protective softwares on our devices without compromise.
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