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"The second big reason Macs cost less is that you don't have to buy anti-virus software (much less waste hours running them)."
How many times have people pointed out that you can get plenty of anti-malware, spyware and other anti-virus stuff for FREE and that even if you buy it, it's not expensive, it's easy to use, it doesn't waste hours of your time running stuff and the cost certainly doesn't even make a dent in the sizable difference between similarly equipped MACs and PCs. But, I guess the strategy is that if you repeat it enough it becomes true.