One who heard about computers will have known about
computer virus also.Whoever using computer must beware of viruses.It
is also a software similar to other softwares.This is a product from expert programmers.So more care must be taken to wipe out viruses from computer.If a virus enters in to the computer ,it links up with a software which is already installed.When we execute the infected program,the virus starts functioning.There are virus softwares which function only on a specific date.The virus Friday thirteenth functions only when the date is 13 and day becomes friday.Another virus Michelangelo functions on March 6,the birthday of the great Artist Michelangelo.
The viruses are divided in to many categories.One type links with the programme and start functioning when the infected software is executed.Another type enters in to the bootsector of the hard disk and starts functioning while booting the computer.
The only way to get rid of the virus is by using an anti-virus programme.These programmes search through the floppy disk,hard disk etc and destroy the viruses.These softwares are very costly.
The following steps help us to prevent the virus from entering in to our computer.
*Buy only the licensed software and not a pirated version.
*Install the best anti-virus software and update frequently.
*Scan before using disks from outside and make sure that they are not infected by virus.
*Before opening an e-mail,make sure that the attachment of the e-mail is not infected.
Some anti-virus softwares reside in the memory and inform us the presence of virus while using an infected disk.To reduce the loss of data or software ,back up the data or software frequently.This helps us to restore them from the back up.To make back up ,always use CDs which are more durable than floppy disks.It is better for the business people who are using computers for accounting to keep hard copies
.
Anti-virus software cannot guarantee that the hard disk is virus free because an anti-virus programme verifies only for a list of viruses which are known and there may be many other viruses unknown to the author of the anti-virus software.Day by day new viruses are generated.The damage caused by the virus ''I Love You'' and ''Melisa'' were huge as we have known.