Avast Free Antivirus
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Full user review
"Best option for free"
Fast download, updates daily. No constant ads like zone alarm and did not hijack my search engine etc.
Seems to bog my computer down, at least on occasions (possibly when it is scanning, but it doesn't show up on taks manager when this is happening)
Had to restore one time the day after downloading; cannot confirm if this was related to Avast)
Have been a long term user of AVG free (at least 5 versions); unable to successfully download AVG free 2013; Zone Alarm was too intrusive, so decided to try Avast. So far, it has done okay. Very impressed with the rapid download. Possibly bogging down my compurter, but this may just be when I am starting up and it is scanning.
A) it beats the hell out of AVG that won't load
B) beats the hell out of Zone Alarm that intrudes
C) May take a trial run with Norton when I get my new computer (soon?)
D. I run malwarebytes regularly, so clearly I feel the need to cover my tail end.