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FTC bans antivirus giant Avast from selling its users' browsing data to advertisers
(techcrunch.com)
This is a most excellent place for technology news and articles.
I worked geek squad for years. The vast majority of malware was people downloading free games or free software and then not checking the custom install settings to uncheck the "install McAfee security scanner" or whatever toolbar and redirection it was at the time.