Computer viruses – definition, symptoms, and mode of infection
                     Computer viruses – 
definition, symptoms, 
and mode of infection
What are computer viruses?
• They have malicious purposes and are different
• They have the ability to reproduce itself and can transmit to different computer 
systems
• Just like a virus spreading infection
• It disturbs the functioning of one’s computer normally
• They hamper programs, delete files, reformat hard drives
What are the symptoms of an 
affected computer from a virus?
• Your computer’s performance is affected as it becomes slower
• The behavior of the affected computer becomes inconsistent and 
erratic
• The system will lose its data randomly without any cause
• And the computer show episodes of frequent crashes.
How does a virus get into a 
computer system?
• They come to have to you as hidden files from cybercriminals, infected computers, and other in email 
spams
• By making itself benign and different from other software
• From questionable websites in the form of pop-ups
• Or by using virus protection of an outdated computer
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