15. what is the computer virus?

> computer viruses are small programs that are designed to replicate , attach to other program and perform unsolicited and malicious actions to the software system . these virus programs are software use programs so that program will be run the attached virus program as it boots open executes therefore it is said that the virus infectes the executable file or program . these are entered form external sources and easily hide in healthy in healthy software .

A virus is an inactive until you external an infected program or application or start your computer memory and may save itself hard drive or copies itself to application or system files on you use.

an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.

"the hepatitis B virus" piece of code which is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data.A computer virus is a malware program that, when executed, replicates by inserting copies of itself (possibly modified) into other computer programs, data files, or the boot sector of the hard drive; when this replication succeeds, the affected areas are then said to be "infected".

‎Blaster - ‎Comparison of computer viruses - ‎Creeper (program) - ‎BrainDesigned to relentlessly replicate, computer viruses infect your programs and files, alter the way your computer operates or stop it from working altogether. computer virus is a program that spreads malicious code by copying itself and infecting host computers. Although some viruses are latent, others can corrupt ...that is called computer virus .

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Republican presidential candidates focus on national security issues in the first debate since attacks in California and Paris.

                                   figar of computer virus