Avira Free Antivirus
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Full user review
"It really is the best with highest detection rates"
Best detection rates out of all the Free ones.Lighter on your computer than any of the other Free ones.I have used this on my main computer for about 3 years.
No cons for me
I like Avira better than Avast or AVG.It has higher detection rates than both of them.Doesn't slow down your computer much at all like AVG and Avast on a Pentium 4 computer.I would highly recommend it.