Avast Free Antivirus
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Full user review
"One of the best free antiviral solutions available"
Excellent realtime protection
Constantly updated database
Doesn't slow down the computer
Site rating feature and sandbox feature is nice and now free.
Average detection of rogue applications, though to be fair it does protect most redirection advertisements from even displaying.
Avast has always been stereotypically known for offering good protection against antivirus, and 6.0 still lives up to it's legacy. Since the new update, some paid features have been included in the free version such as the sandbox feature and now has a site rating system to help guard against malicious websites.
Protection is above average, but it's most superior in performance. It doesn't slow down the average computer and scans run rather quickly compared to the competition. It has excellent realtime protection, safeguarding against most pesky 'YOUR PC IS INFECTING SCAN NOW' advertisements. All in all, I recommend this product.