F-Prot Antivirus for Windows
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Full user review
"Best AntiVirus Software product on the market."
I've been using F-Prot for over 6 years now and would recommend it to anybody. It's lightweight because of it's small footprint which of course allows it to perform an entire disk scan without affecting your front-end processing.
There's nothing I don't like about it.
They offer a Windows and Linux/Unix version and pricing is very very well worth what you pay for. Rather than purchase 2 single-user licenses, it's cheaper to buy the 10 license corporate pack!
When viruses are spreading across the internet, I've seen them update the signature files up to 5 times a day! Quite impressive!