Answers

2016-01-25T19:03:18+05:30
Protect the system from virus
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2016-01-25T19:06:33+05:30
An antivirus software basically acts as a filter between you and the internet.
It doesn't allow you to download files that contain code that might harm your device.
But the current generation anti-virus softwares also have extra functions like:
-scanning your computer for existing virus or Trojan.
-preventing unknown devices to send and receive packets from your device (basically prevent MITM attacks) 
 
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