[HAL9000]

From the article - "One problem is that, under antitrust rulings, Microsoft has to keep antivirus protection separate from the operating system."

No, the problem is that Windows OS is poorly designed. There is no antitrust ruling that requires Microsoft to produce low-quality crap, they just do it on their own volition.

[CedarDave]

The following paragraph to your quote is also telling:

It sells its OneCare protection and backup service for $50 a year, when it really should be included in the operating system. Imagine. They sell a vulnerable operating system for as much as $400 then get to sell you the antivirus software and other protections on top of that.