Definition Of viruses
a piece of code that is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data.
A computer virus or spyware application is sending us automated requests, and it appears that your computer or network has been infected.
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.
a virus infection