The convenience of free anti-viruses helps make it the more popular choice. You can just Google for free anti-viruses and you will easily find where to download one. It is also easier to install since it does not require CDs or any hardware to insert into your computer. All you would have to do is download it from the site, install, and set its settings. Most anti-viruses will run in the background and use as little resource as it can as to not bother you or slow down your computer.
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