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Anti-virus

If you're not confident of your anti-virus program then uninstall it and use another. I have used AVG Free for a number of years and it has not failed me in a very long time.

http://free.avg.com/download-avg-anti-virus-free-edition

When offered product upgrade stick with the free option.

Make sure your anti-virus updates every time you start your computer and/or connect to the internet. Anti-virus programs normally do this by default.
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