Use anti-virus software. Google this and you will find lots, some are free some are not. AVG is a good bet. We use this in the school I support and it works fine for us.
You didn't say it was for commercial use. We have licenses for this software as we are commercial. The home version is free. We also use a e-trust which is supplied from county and is free for us.
No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.