Re: I bought windows 7 retail
"AV companies can't do this because they know they have no future in Linux/BSD."
Really? You must have missed the many recent Android Malware infestations including the latest Pin locker ones!
Seeing as competing Open Source OS distributions generally have far more known vulnerabilities that on average take longer to patch (more days at risk) than with Windows - if Linux ever made it over 2% market share on the desktop then I'm sure such scanners would be essential.