The history of computer viruses dates back to 1986. Computer viruses used to distributed by magnetic disk. But as the Internet went popular, viruses set out distributing faster by email. It all started in 1999 when Genus Melissa virus infected over 100,000 calculators. The LoveLetter virus made wrongs of more than $ 8 billion in 2000. In 2003 the Slammer Worm most took the intact Net down. These and other renowned computer viruses and fast distributing worms have harmed the Web with malicious computation. To keep wrongs, virus protective covering and remotion computer programs have become the norm. Below are clauses which furnish info on computer viruses, computer virus security software program, virus remotion tools and anti virus programmes.