Computer security can be defined as the protection of computer and its data from any loss or illegal access from other users. Normally file virus or program virus attaches itself with program files and activates when these program files are run. Infected program files are normally downloaded from Internet. When ever you are trying to download any program from the Internet, always download from trusty sites. On Internet the Software cracker or key generator sites are the main sources of computer virus.
When you are downloading any program or file from the internet, for example any antivirus program or an email attachment from your friends. You must select the Save option, if you are downloading this program from any unknown or free software sites. First scan the downloaded program before open it. You have extra security layer if you save the setup file before run it.
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